Move extension messages to their own file and add a RenderViewObserver to start moving the extens...

chrome/browser/extensions/extension_function_dispatcher.h

 // Copyright (c) 2011 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 CHROME_BROWSER_EXTENSIONS_EXTENSION_FUNCTION_DISPATCHER_H_
 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_FUNCTION_DISPATCHER_H_
 #pragma once
 
 #include <string>
 #include <vector>
 
 #include "base/ref_counted.h"
 #include "googleurl/src/gurl.h"
 #include "ui/gfx/native_widget_types.h"
 
 class Browser;
 class Extension;
 class ExtensionFunction;
 class ListValue;
 class Profile;
 class RenderViewHost;
 class TabContents;
-struct ViewHostMsg_DomMessage_Params;
+struct ExtensionHostMsg_DomMessage_Params;
 
 // A factory function for creating new ExtensionFunction instances.
 typedef ExtensionFunction* (*ExtensionFunctionFactory)();
 
 // ExtensionFunctionDispatcher receives requests to execute functions from
 // Chromium extensions running in a RenderViewHost and dispatches them to the
 // appropriate handler. It lives entirely on the UI thread.
 class ExtensionFunctionDispatcher {
  public:
   class Delegate {
@@ skipping 45 matching lines @@
   // does not contain a valid extension, returns NULL.
   static ExtensionFunctionDispatcher* Create(RenderViewHost* render_view_host,
                                              Delegate* delegate,
                                              const GURL& url);
 
   ~ExtensionFunctionDispatcher();
 
   Delegate* delegate() { return delegate_; }
 
   // Handle a request to execute an extension function.
-  void HandleRequest(const ViewHostMsg_DomMessage_Params& params);
+  void HandleRequest(const ExtensionHostMsg_DomMessage_Params& params);
 
   // Send a response to a function.
   void SendResponse(ExtensionFunction* api, bool success);
 
   // Returns the current browser. Callers should generally prefer
   // ExtensionFunction::GetCurrentBrowser() over this method, as that one
   // provides the correct value for |include_incognito|.
   //
   // See the comments for ExtensionFunction::GetCurrentBrowser() for more
   // details.
@@ skipping 38 matching lines @@
 
   // AutomationExtensionFunction requires access to the RenderViewHost
   // associated with us.  We make it a friend rather than exposing the
   // RenderViewHost as a public method as we wouldn't want everyone to
   // start assuming a 1:1 relationship between us and RenderViewHost,
   // whereas AutomationExtensionFunction is by necessity "tight" with us.
   friend class AutomationExtensionFunction;
 };
 
 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_FUNCTION_DISPATCHER_H_