Cleanup: Adding more conversion helper interfaces.

Source/core/loader/FrameLoaderClient.h

Index: Source/core/loader/FrameLoaderClient.h
diff --git a/Source/core/loader/FrameLoaderClient.h b/Source/core/loader/FrameLoaderClient.h
index 162e41e89e2443bbf73140e125c8d5a1692a9eda..9776a561c4613868afde862e3c6d20887acc2d3e 100644
--- a/Source/core/loader/FrameLoaderClient.h
+++ b/Source/core/loader/FrameLoaderClient.h
@@ -221,6 +221,8 @@ class FetchRequest;
         virtual WebKit::WebServiceWorkerRegistry* serviceWorkerRegistry() = 0;
 
         virtual void didStopAllLoaders() { }
+
+        virtual bool isFrameLoaderClient() const { return false; }

[tkent, 2013/10/08 22:22:39]

The function name is very confusing. This is FrameLoaderClient class, and should
not have isFrameLoaderClient function.  Do you mean isFrameLoaderClientImpl()?

We had better wrap this function with "#if !ASSERT_DISABLED".

     };
 
 } // namespace WebCore