Deal with frame removal by content scripts

chrome/renderer/extensions/chrome_extensions_renderer_client.h

Index: chrome/renderer/extensions/chrome_extensions_renderer_client.h
diff --git a/chrome/renderer/extensions/chrome_extensions_renderer_client.h b/chrome/renderer/extensions/chrome_extensions_renderer_client.h
index 2559b82bcdfaae47603ba321337e0fd5e6cf17d0..c9fc439216dfba7aa96967537ecbb8019ef6856f 100644
--- a/chrome/renderer/extensions/chrome_extensions_renderer_client.h
+++ b/chrome/renderer/extensions/chrome_extensions_renderer_client.h
@@ -9,6 +9,7 @@
 
 #include "base/macros.h"
 #include "base/memory/scoped_ptr.h"
+#include "base/memory/weak_ptr.h"
 #include "extensions/renderer/extensions_renderer_client.h"
 #include "ui/base/page_transition_types.h"
 
@@ -72,6 +73,11 @@ class ChromeExtensionsRendererClient
       const std::string& mime_type,
       const GURL& original_url);
 
+  void AfterDidCreateDocumentElement(
+      const base::WeakPtr<content::RenderFrame>& render_frame);
+  void AfterDidFinishDocumentLoad(
+      const base::WeakPtr<content::RenderFrame>& render_frame);
+
   extensions::Dispatcher* extension_dispatcher() {
     return extension_dispatcher_.get();
   }