[Extensions] Kill off ExtensionMsg_AddMessageToConsole

extensions/renderer/extension_helper.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 EXTENSIONS_RENDERER_EXTENSION_HELPER_H_
 #define EXTENSIONS_RENDERER_EXTENSION_HELPER_H_
 
 #include <vector>
 
 #include "content/public/common/console_message_level.h"
@@ skipping 22 matching lines @@
   // RenderViewObserver implementation.
   bool OnMessageReceived(const IPC::Message& message) override;
   void DidCreateDocumentElement(blink::WebLocalFrame* frame) override;
   void DidMatchCSS(
       blink::WebLocalFrame* frame,
       const blink::WebVector<blink::WebString>& newly_matching_selectors,
       const blink::WebVector<blink::WebString>& stopped_matching_selectors)
       override;
   void DraggableRegionsChanged(blink::WebFrame* frame) override;
 
-  void OnAddMessageToConsole(content::ConsoleMessageLevel level,
-                             const std::string& message);
   void OnAppWindowClosed();
   void OnSetFrameName(const std::string& name);
 
   Dispatcher* dispatcher_;
 
   // Id number of browser window which RenderView is attached to.
   int browser_window_id_;
 
   DISALLOW_COPY_AND_ASSIGN(ExtensionHelper);
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_RENDERER_EXTENSION_HELPER_H_