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

chrome/browser/about_flags.cc

Index: chrome/browser/about_flags.cc
diff --git a/chrome/browser/about_flags.cc b/chrome/browser/about_flags.cc
index a8556ccf652a4c818526139707ea3c717dacd608..f7cdb84c6eece3e831da712eade7dede468dce50 100644
--- a/chrome/browser/about_flags.cc
+++ b/chrome/browser/about_flags.cc
@@ -1101,6 +1101,20 @@ const FeatureEntry::Choice kAsyncImageDecodingChoices[] = {
      cc::switches::kDisableCheckerImaging, ""},
 };
 
+#define DEFINE_TDI_MODE_FEATURE_PARAM(name, value, description)               \
+  const FeatureEntry::FeatureParam kTopDocumentIsolationVariations_##name[] = \
+      {{features::kTopDocumentIsolationModeParam, #value}};
+FOR_EACH_TDI_MODE(DEFINE_TDI_MODE_FEATURE_PARAM)
+#undef DEFINE_TDI_MODE_FEATURE_PARAM
+
+const FeatureEntry::FeatureVariation kTopDocumentIsolationVariations[] = {
+#define DEFINE_TDI_MODE_VARIATION(name, value, description)                 \
+  {"(" #name " - " description ")", kTopDocumentIsolationVariations_##name, \
+   arraysize(kTopDocumentIsolationVariations_##name), nullptr},
+    FOR_EACH_TDI_MODE(DEFINE_TDI_MODE_VARIATION)
+#undef DEFINE_TDI_MODE_VARIATION
+};
+
 // RECORDING USER METRICS FOR FLAGS:
 // -----------------------------------------------------------------------------
 // The first line of the entry is the internal name.
@@ -1958,7 +1972,9 @@ const FeatureEntry kFeatureEntries[] = {
     {"enable-top-document-isolation",
      flag_descriptions::kTopDocumentIsolationName,
      flag_descriptions::kTopDocumentIsolationDescription, kOsAll,
-     FEATURE_VALUE_TYPE(features::kTopDocumentIsolation)},
+     FEATURE_WITH_PARAMS_VALUE_TYPE(features::kTopDocumentIsolation,
+                                    kTopDocumentIsolationVariations,
+                                    "TopDocumentIsolation")},
     {"enable-use-zoom-for-dsf", flag_descriptions::kEnableUseZoomForDsfName,
      flag_descriptions::kEnableUseZoomForDsfDescription, kOsAll,
      MULTI_VALUE_TYPE(kEnableUseZoomForDSFChoices)},