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

chrome/browser/extensions/extension_host.cc

 // 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.
 
 #include "chrome/browser/extensions/extension_host.h"
 
 #include <list>
 
 #include "base/message_loop.h"
 #include "base/metrics/histogram.h"
@@ skipping 536 matching lines @@
   // TODO(dcheng): incorporate this setting into kClipboardPermission check.
   webkit_prefs.javascript_can_access_clipboard = true;
 
   // TODO(dcheng): check kClipboardPermission instead once it's implemented.
   if (extension_->HasApiPermission(Extension::kExperimentalPermission))
     webkit_prefs.dom_paste_enabled = true;
   return webkit_prefs;
 }
 
 void ExtensionHost::ProcessWebUIMessage(
-    const ViewHostMsg_DomMessage_Params& params) {
+    const ExtensionHostMsg_DomMessage_Params& params) {
   if (extension_function_dispatcher_.get()) {
     extension_function_dispatcher_->HandleRequest(params);
   }
 }
 
 RenderViewHostDelegate::View* ExtensionHost::GetViewDelegate() {
   return this;
 }
 
 void ExtensionHost::CreateNewWindow(
@@ skipping 272 matching lines @@
   }
   return window_id;
 }
 
 void ExtensionHost::OnRunFileChooser(
     const ViewHostMsg_RunFileChooser_Params& params) {
   if (file_select_helper_.get() == NULL)
     file_select_helper_.reset(new FileSelectHelper(profile()));
   file_select_helper_->RunFileChooser(render_view_host_, params);
 }