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 805f11498046df3ef11cb5e4f63fab9fd4f63496..f0d6ec49a6e4342edab5bd74a95dafe8e168f7d9 100644
--- a/chrome/browser/about_flags.cc
+++ b/chrome/browser/about_flags.cc
@@ -1078,6 +1078,20 @@ const FeatureEntry::FeatureVariation kOmniboxUIVerticalMarginVariations[] = {
     {"14px vertical margin", kOmniboxUIVerticalMargin14px,
      arraysize(kOmniboxUIVerticalMargin14px), nullptr}};
 
+#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.
@@ -1936,7 +1950,9 @@ 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)},