Allow content script insertion on about:-URLs.

extensions/renderer/script_context.h

Index: extensions/renderer/script_context.h
diff --git a/extensions/renderer/script_context.h b/extensions/renderer/script_context.h
index 5cc137e9e924b826f6e845cfbc15eb63dd07719d..d5f1ae104487c1bf0ce6ed1e582f93f633aa12a0 100644
--- a/extensions/renderer/script_context.h
+++ b/extensions/renderer/script_context.h
@@ -105,6 +105,13 @@ class ScriptContext : public RequestSender::Source {
   // committed, this is the commited URL. Otherwise it is the provisional URL.
   static GURL GetDataSourceURLForFrame(const blink::WebFrame* frame);
 
+  // Returns the first non-about:-URL in the document hierarchy above and
+  // including |frame|. The document hierarchy is only traversed if
+  // |document_url| is an about:-URL and if |match_about_blank| is true.
+  static GURL GetEffectiveDocumentURL(const blink::WebFrame* frame,
+                                      const GURL& document_url,
+                                      bool match_about_blank);
+
   // RequestSender::Source implementation.
   virtual ScriptContext* GetContext() OVERRIDE;
   virtual void OnResponseReceived(const std::string& name,