Split content script injections into multiple tasks

extensions/renderer/dispatcher.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_DISPATCHER_H_
 #define EXTENSIONS_RENDERER_DISPATCHER_H_
 
 #include <stdint.h>
 
 #include <map>
@@ skipping 95 matching lines @@
       int64_t service_worker_version_id,
       const GURL& url);
 
   // This method is not allowed to run JavaScript code in the frame.
   void DidCreateDocumentElement(blink::WebLocalFrame* frame);
 
   // These methods may run (untrusted) JavaScript code in the frame, and
   // cause |render_frame| to become invalid.
   void RunScriptsAtDocumentStart(content::RenderFrame* render_frame);
   void RunScriptsAtDocumentEnd(content::RenderFrame* render_frame);
+  void RunScriptsAtDocumentIdle(content::RenderFrame* render_frame);
 
   void OnExtensionResponse(int request_id,
                            bool success,
                            const base::ListValue& response,
                            const std::string& error);
 
   // Dispatches the event named |event_name| to all render views.
   void DispatchEvent(const std::string& extension_id,
                      const std::string& event_name,
                      const base::ListValue& event_args,
@@ skipping 163 matching lines @@
   // if this renderer is a WebView guest render process. Otherwise, this will be
   // empty.
   std::string webview_partition_id_;
 
   DISALLOW_COPY_AND_ASSIGN(Dispatcher);
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_RENDERER_DISPATCHER_H_