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

chrome/browser/chrome_content_browser_client.h

Index: chrome/browser/chrome_content_browser_client.h
diff --git a/chrome/browser/chrome_content_browser_client.h b/chrome/browser/chrome_content_browser_client.h
index c3cc765885eb8b87664aa0b924a6d57b36f97fe8..e5220bc834ca204b2c5e8a4acc9839df14e4419a 100644
--- a/chrome/browser/chrome_content_browser_client.h
+++ b/chrome/browser/chrome_content_browser_client.h
@@ -112,9 +112,9 @@
                                 ui::PageTransition* transition,
                                 bool* is_renderer_initiated,
                                 content::Referrer* referrer) override;
-  bool ShouldIsolateFrameForTopDocumentIsolation(
-      content::NavigationHandle* navigation_handle,
-      content::SiteInstance* main_frame_site_instance) override;
+  bool ShouldFrameShareParentSiteInstanceDespiteTopDocumentIsolation(
+      const GURL& url,
+      content::SiteInstance* parent_site_instance) override;
   bool IsSuitableHost(content::RenderProcessHost* process_host,
                       const GURL& site_url) override;
   bool MayReuseHost(content::RenderProcessHost* process_host) override;