Move isLoading() from WebFrame to WebLocalFrame

public/web/WebLocalFrame.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef WebLocalFrame_h
 #define WebLocalFrame_h
 
 #include "WebFrame.h"
 
 namespace blink {
@@ skipping 23 matching lines @@
 
     // Navigation Transitions  ---------------------------------------------
     virtual void addStyleSheetByURL(const WebString& url) = 0;
     virtual void navigateToSandboxedMarkup(const WebData& markup) = 0;
 
     virtual void sendPings(const WebNode& linkNode, const WebURL& destinationURL) = 0;
 
 
     // Navigation State -------------------------------------------------------
 
+    // Returns true if the current frame's load event has not completed.
+    virtual bool isLoading() const = 0;
+
     // Returns true if any resource load is currently in progress. Exposed
     // primarily for use in layout tests. You probably want isLoading()
     // instead.
     virtual bool isResourceLoadInProgress() const = 0;
 };
 
 } // namespace blink
 
 #endif // WebLocalFrame_h