Change Page::m_mainFrame to be a Frame.

Source/web/WebDevToolsFrontendImpl.cpp

 /*
  * Copyright (C) 2010 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 103 matching lines @@
 {
     // We should call maybeDispatch asynchronously here because we are not allowed to update activeDOMObjects list in
     // resume (See ExecutionContext::resumeActiveDOMObjects).
     if (!m_inspectorFrontendDispatchTimer.isActive())
         m_inspectorFrontendDispatchTimer.startOneShot(0, FROM_HERE);
 }
 
 void WebDevToolsFrontendImpl::maybeDispatch(WebCore::Timer<WebDevToolsFrontendImpl>*)
 {
     while (!m_messages.isEmpty()) {
-        Document* document = m_webViewImpl->page()->mainFrame()->document();
+        Document* document = m_webViewImpl->page()->deprecatedLocalMainFrame()->document();
         if (document->activeDOMObjectsAreSuspended()) {
             m_inspectorFrontendResumeObserver = adoptPtr(new InspectorFrontendResumeObserver(this, document));
             return;
         }
         m_inspectorFrontendResumeObserver.clear();
         doDispatchOnInspectorFrontend(m_messages.takeFirst());
     }
 }
 
 void WebDevToolsFrontendImpl::doDispatchOnInspectorFrontend(const WebString& message)
@@ skipping 23 matching lines @@
     }
     v8::Handle<v8::Function> function = v8::Handle<v8::Function>::Cast(dispatchFunction);
     Vector< v8::Handle<v8::Value> > args;
     args.append(v8String(isolate, message));
     v8::TryCatch tryCatch;
     tryCatch.SetVerbose(true);
     ScriptController::callFunction(frame->frame()->document(), function, dispatcherObject, args.size(), args.data(), isolate);
 }
 
 } // namespace blink