Use FrameIsAd to decide whether to isolate a frame in TopDocumentIsolation mode.

chrome/browser/BUILD.gn

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import("//build/config/chrome_build.gni")
 import("//build/config/crypto.gni")
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//build/split_static_library.gni")
 import("//chrome/common/features.gni")
@@ skipping 797 matching lines @@
     "ntp_snippets/download_suggestions_provider.cc",
     "ntp_snippets/download_suggestions_provider.h",
     "ntp_snippets/ntp_snippets_metrics.cc",
     "ntp_snippets/ntp_snippets_metrics.h",
     "ntp_tiles/chrome_most_visited_sites_factory.cc",
     "ntp_tiles/chrome_most_visited_sites_factory.h",
     "ntp_tiles/chrome_popular_sites_factory.cc",
     "ntp_tiles/chrome_popular_sites_factory.h",
     "offline_items_collection/offline_content_aggregator_factory.cc",
     "offline_items_collection/offline_content_aggregator_factory.h",
+    "page_load_metrics/ads_detection.cc",
+    "page_load_metrics/ads_detection.h",
     "page_load_metrics/browser_page_track_decider.cc",
     "page_load_metrics/browser_page_track_decider.h",
     "page_load_metrics/experiments/delay_navigation_throttle.cc",
     "page_load_metrics/experiments/delay_navigation_throttle.h",
     "page_load_metrics/metrics_navigation_throttle.cc",
     "page_load_metrics/metrics_navigation_throttle.h",
     "page_load_metrics/metrics_web_contents_observer.cc",
     "page_load_metrics/metrics_web_contents_observer.h",
     "page_load_metrics/observers/aborts_page_load_metrics_observer.cc",
     "page_load_metrics/observers/aborts_page_load_metrics_observer.h",
@@ skipping 3795 matching lines @@
       "//components/search_engines",
       "//rlz:rlz_lib",
     ]
   }
 }
 
 service_manifest("preferences_forwarder_manifest") {
   name = "preferences_forwarder"
   source = "prefs/forwarder_manifest.json"
 }