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@@ -17,66 +17,137 @@ Following is the complete list of machine learning models in Chrome many of whic
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  # Mapping of folder names to optimization target descriptions
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  ```
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- OPTIMIZATION_TARGETS = {
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- "0": "UNKNOWN",
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- "1": "PAINFUL_PAGE_LOAD",
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- "2": "LANGUAGE_DETECTION",
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- "3": "PAGE_TOPICS",
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- "4": "SEGMENTATION_NEW_TAB",
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- "5": "SEGMENTATION_SHARE",
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- "6": "SEGMENTATION_VOICE",
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- "7": "MODEL_VALIDATION",
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- "8": "PAGE_ENTITIES",
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- "9": "NOTIFICATION_PERMISSION_PREDICTIONS",
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- "10": "SEGMENTATION_DUMMY",
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- "11": "SEGMENTATION_CHROME_START_ANDROID",
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- "12": "SEGMENTATION_QUERY_TILES",
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- "13": "PAGE_VISIBILITY",
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- "15": "PAGE_TOPICS_V2",
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- "16": "SEGMENTATION_CHROME_LOW_USER_ENGAGEMENT",
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- "17": "SEGMENTATION_FEED_USER",
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- "18": "CONTEXTUAL_PAGE_ACTION_PRICE_TRACKING",
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- "19": "TEXT_CLASSIFIER",
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- "20": "GEOLOCATION_PERMISSION_PREDICTIONS",
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- "21": "SEGMENTATION_SHOPPING_USER",
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- "22": "SEGMENTATION_CHROME_START_ANDROID_V2",
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- "23": "SEGMENTATION_SEARCH_USER",
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- "24": "OMNIBOX_ON_DEVICE_TAIL_SUGGEST",
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- "25": "CLIENT_SIDE_PHISHING",
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- "26": "OMNIBOX_URL_SCORING",
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- "27": "SEGMENTATION_DEVICE_SWITCHER",
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- "28": "SEGMENTATION_ADAPTIVE_TOOLBAR",
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- "29": "SEGMENTATION_TABLET_PRODUCTIVITY_USER",
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- "30": "CLIENT_SIDE_PHISHING_IMAGE_EMBEDDER",
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- "31": "NEW_TAB_PAGE_HISTORY_CLUSTERS_MODULE_RANKING",
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- "32": "WEB_APP_INSTALLATION_PROMO",
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- "33": "TEXT_EMBEDDER",
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- "34": "VISUAL_SEARCH_CLASSIFICATION",
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- "35": "SEGMENTATION_BOTTOM_TOOLBAR",
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- "36": "AUTOFILL_FIELD_CLASSIFICATION",
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- "37": "SEGMENTATION_IOS_MODULE_RANKER",
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- "38": "SEGMENTATION_DESKTOP_NTP_MODULE",
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- "39": "PRELOADING_HEURISTICS",
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- "40": "TEXT_SAFETY",
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- "41": "SEGMENTATION_ANDROID_HOME_MODULE_RANKER",
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- "42": "COMPOSE",
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- "43": "PASSAGE_EMBEDDER",
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- "44": "PHRASE_SEGMENTATION",
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- "45": "SEGMENTATION_COMPOSE_PROMOTION",
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- "46": "URL_VISIT_RESUMPTION_RANKER",
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- "47": "CAMERA_BACKGROUND_SEGMENTATION",
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- "48": "MODEL_EXECUTION_FEATURE_HISTORY_SEARCH",
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- "49": "MODEL_EXECUTION_FEATURE_PROMPT_API",
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- "50": "SEGMENTATION_METRICS_CLUSTERING",
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- "51": "MODEL_EXECUTION_FEATURE_SUMMARIZE",
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- "52": "PASSWORD_MANAGER_FORM_CLASSIFICATION",
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- "53": "NOTIFICATION_CONTENT_DETECTION",
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- "54": "MODEL_EXECUTION_FEATURE_HISTORY_QUERY_INTENT",
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- "55": "MODEL_EXECUTION_FEATURE_SCAM_DETECTION",
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- "56": "MODEL_EXECUTION_FEATURE_PERMISSIONS_AI",
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- "57": "EXPERIMENTAL_EMBEDDER",
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- "58": "SEGMENTATION_FEDCM_USER",
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- "59": "MODEL_EXECUTION_FEATURE_WRITING_ASSISTANCE_API"
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
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  }
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  ```
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  # Mapping of folder names to optimization target descriptions
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  ```
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+ enum OptimizationTarget {
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+ reserved 14;
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+
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+ OPTIMIZATION_TARGET_UNKNOWN = 0;
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+ // Should only be applied when the page load is predicted to be painful.
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+ OPTIMIZATION_TARGET_PAINFUL_PAGE_LOAD = 1;
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+ // Target for supplying the language detection model via the model downloader.
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+ OPTIMIZATION_TARGET_LANGUAGE_DETECTION = 2;
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+ // Target for determining topics present on a page.
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+ OPTIMIZATION_TARGET_PAGE_TOPICS = 3;
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+ // Target for segmentation: New tab page user.
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+ OPTIMIZATION_TARGET_SEGMENTATION_NEW_TAB = 4;
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+ // Target for segmentation: Share user.
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+ OPTIMIZATION_TARGET_SEGMENTATION_SHARE = 5;
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+ // Target for segmentation: Voice user.
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+ OPTIMIZATION_TARGET_SEGMENTATION_VOICE = 6;
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+ // Target for model validation.
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+ OPTIMIZATION_TARGET_MODEL_VALIDATION = 7;
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+ // Target for determining entities present on a page.
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+ OPTIMIZATION_TARGET_PAGE_ENTITIES = 8;
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+ // Target for Chrome Permissions Suggestions Service: Notification permission.
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+ OPTIMIZATION_TARGET_NOTIFICATION_PERMISSION_PREDICTIONS = 9;
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+ // Target that enables data collection on client side for various experiments.
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+ OPTIMIZATION_TARGET_SEGMENTATION_DUMMY = 10;
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+ // Target for segmentation: Chrome Android Start user.
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+ OPTIMIZATION_TARGET_SEGMENTATION_CHROME_START_ANDROID = 11;
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+ // Target for segmentation: Query Tiles user.
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+ OPTIMIZATION_TARGET_SEGMENTATION_QUERY_TILES = 12;
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+ // Target for determining the UI visibility of a page.
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+ OPTIMIZATION_TARGET_PAGE_VISIBILITY = 13;
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+ // Target for determining topics present on a page.
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+ // TODO(crbug.com/40204121): Remove PAGE_TOPICS in favor of this target.
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+ OPTIMIZATION_TARGET_PAGE_TOPICS_V2 = 15;
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+ // Target for segmentation: Determine users with low engagement with chrome.
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+ OPTIMIZATION_TARGET_SEGMENTATION_CHROME_LOW_USER_ENGAGEMENT = 16;
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+ // Target for segmentation: Determine users who prefer to use Feed.
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+ OPTIMIZATION_TARGET_SEGMENTATION_FEED_USER = 17;
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+ // Target for segmentation: Determine whether price tracking should be shown
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+ // as a contextual page action.
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+ OPTIMIZATION_TARGET_CONTEXTUAL_PAGE_ACTION_PRICE_TRACKING = 18;
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+ // Target for smart text selection and entity extraction.
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+ OPTIMIZATION_TARGET_TEXT_CLASSIFIER = 19;
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+ // Target for Chrome Permissions Suggestions Service: Geolocation permission.
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+ OPTIMIZATION_TARGET_GEOLOCATION_PERMISSION_PREDICTIONS = 20;
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+ // Target for segmentation: Determine users who are interested in shopping.
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+ OPTIMIZATION_TARGET_SEGMENTATION_SHOPPING_USER = 21;
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+ // Target for segmentation: Chrome Android Start user V2.
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+ OPTIMIZATION_TARGET_SEGMENTATION_CHROME_START_ANDROID_V2 = 22;
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+ // Target for segmentation: Determine users who use search.
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+ OPTIMIZATION_TARGET_SEGMENTATION_SEARCH_USER = 23;
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+ // Target for Omnibox on device tail suggest.
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+ OPTIMIZATION_TARGET_OMNIBOX_ON_DEVICE_TAIL_SUGGEST = 24;
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+ // Target for client side phishing
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+ OPTIMIZATION_TARGET_CLIENT_SIDE_PHISHING = 25;
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+ // Target for Omnibox URL suggestion scoring.
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+ OPTIMIZATION_TARGET_OMNIBOX_URL_SCORING = 26;
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+ // Target for segmentation: Segment of users who switched devices.
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+ OPTIMIZATION_TARGET_SEGMENTATION_DEVICE_SWITCHER = 27;
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+ // Target for segmentation: Adaptive toolbar button.
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+ OPTIMIZATION_TARGET_SEGMENTATION_ADAPTIVE_TOOLBAR = 28;
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+ // Target for segmentation: Determine users who are tabletproductivity users.
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+ OPTIMIZATION_TARGET_SEGMENTATION_TABLET_PRODUCTIVITY_USER = 29;
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+ // Target for client side phishing image embedding model.
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+ OPTIMIZATION_TARGET_CLIENT_SIDE_PHISHING_IMAGE_EMBEDDER = 30;
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+ // Target for ranking clusters that have passed minimal filtering for the New
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+ // Tab Page History Clusters module.
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+ OPTIMIZATION_TARGET_NEW_TAB_PAGE_HISTORY_CLUSTERS_MODULE_RANKING = 31;
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+ // Target for web app install promotion.
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+ OPTIMIZATION_TARGET_WEB_APP_INSTALLATION_PROMO = 32;
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+ // Target for generic text embedder model.
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+ OPTIMIZATION_TARGET_TEXT_EMBEDDER = 33;
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+ // Target for classifying and extracting search images on web page.
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+ OPTIMIZATION_TARGET_VISUAL_SEARCH_CLASSIFICATION = 34;
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+ // Target for classifying users to target bottom toolbar.
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+ OPTIMIZATION_TARGET_SEGMENTATION_BOTTOM_TOOLBAR = 35;
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+ // Target for Autofill field type classification model.
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+ OPTIMIZATION_TARGET_AUTOFILL_FIELD_CLASSIFICATION = 36;
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+ // Target for ranking ios start page modules.
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+ OPTIMIZATION_TARGET_SEGMENTATION_IOS_MODULE_RANKER = 37;
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+ // Target for segmentation: Determine what modules a user should see on their
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+ // Desktop New Tab Page.
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+ OPTIMIZATION_TARGET_SEGMENTATION_DESKTOP_NTP_MODULE = 38;
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+ // Target for predicting candidate links for speculation-rule based
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+ // preloading.
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+ OPTIMIZATION_TARGET_PRELOADING_HEURISTICS = 39;
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+ // Target for determining text safety.
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+ OPTIMIZATION_TARGET_TEXT_SAFETY = 40;
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+ // Target for ranking Android home modules.
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+ OPTIMIZATION_TARGET_SEGMENTATION_ANDROID_HOME_MODULE_RANKER = 41;
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+ // Target to support running Compose On-Device.
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+ OPTIMIZATION_TARGET_COMPOSE = 42;
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+ // Target for generating passage embeddings.
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+ OPTIMIZATION_TARGET_PASSAGE_EMBEDDER = 43;
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+ // Target for breaking up sentences into phrases.
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+ OPTIMIZATION_TARGET_PHRASE_SEGMENTATION = 44;
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+ // Target to determine whether to show promotion for Compose.
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+ OPTIMIZATION_TARGET_SEGMENTATION_COMPOSE_PROMOTION = 45;
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+ // Target for ranking URL visits used in visit resumption features.
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+ OPTIMIZATION_TARGET_URL_VISIT_RESUMPTION_RANKER = 46;
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+ // Target for background segmentation of video frames.
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+ OPTIMIZATION_TARGET_CAMERA_BACKGROUND_SEGMENTATION = 47;
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+ // Target for History search model.
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+ OPTIMIZATION_TARGET_MODEL_EXECUTION_FEATURE_HISTORY_SEARCH = 48;
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+ // Target for Prompt API feature config.
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+ OPTIMIZATION_TARGET_MODEL_EXECUTION_FEATURE_PROMPT_API = 49;
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+ // Target for metrics based segmentation clustering.
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+ OPTIMIZATION_TARGET_SEGMENTATION_METRICS_CLUSTERING = 50;
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+ // Target for Summarize API feature config.
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+ OPTIMIZATION_TARGET_MODEL_EXECUTION_FEATURE_SUMMARIZE = 51;
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+ // Target for Password Manager form classification model.
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+ OPTIMIZATION_TARGET_PASSWORD_MANAGER_FORM_CLASSIFICATION = 52;
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+ // Target for model classifying notification content as suspicious.
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+ OPTIMIZATION_TARGET_NOTIFICATION_CONTENT_DETECTION = 53;
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+ // Target for History query intent model.
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+ OPTIMIZATION_TARGET_MODEL_EXECUTION_FEATURE_HISTORY_QUERY_INTENT = 54;
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+ // Target for scam detection feature config.
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+ OPTIMIZATION_TARGET_MODEL_EXECUTION_FEATURE_SCAM_DETECTION = 55;
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+ // Target for Permissions AI feature config.
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+ OPTIMIZATION_TARGET_MODEL_EXECUTION_FEATURE_PERMISSIONS_AI = 56;
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+ // Target for assessing embedding model performance.
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+ OPTIMIZATION_TARGET_EXPERIMENTAL_EMBEDDER = 57;
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+ // Target for segmentation: FedCM user.
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+ OPTIMIZATION_TARGET_SEGMENTATION_FEDCM_USER = 58;
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+ // Target for Writing Assistance APIs (Writer and Rewriter).
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+ OPTIMIZATION_TARGET_MODEL_EXECUTION_FEATURE_WRITING_ASSISTANCE_API = 59;
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+ // Target for Geolocation Permission Relevance.
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+ OPTIMIZATION_TARGET_GEOLOCATION_IMAGE_PERMISSION_RELEVANCE = 60;
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+ // Target for Notification Permission Relevance.
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+ OPTIMIZATION_TARGET_NOTIFICATION_IMAGE_PERMISSION_RELEVANCE = 61;
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+ // Target for Proofreader API.
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+ OPTIMIZATION_TARGET_MODEL_EXECUTION_FEATURE_PROOFREADER_API = 62;
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  }
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  ```
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