Split content script injections into multiple tasks

chrome/renderer/chrome_content_renderer_client.h

 // Copyright (c) 2012 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_RENDERER_CHROME_CONTENT_RENDERER_CLIENT_H_
 #define CHROME_RENDERER_CHROME_CONTENT_RENDERER_CLIENT_H_
 
 #include <stddef.h>
 
 #include <map>
@@ skipping 159 matching lines @@
       const std::string& mime_type,
       const GURL& original_url) override;
   void RecordRappor(const std::string& metric,
                     const std::string& sample) override;
   void RecordRapporURL(const std::string& metric, const GURL& url) override;
   void AddImageContextMenuProperties(
       const blink::WebURLResponse& response,
       std::map<std::string, std::string>* properties) override;
   void RunScriptsAtDocumentStart(content::RenderFrame* render_frame) override;
   void RunScriptsAtDocumentEnd(content::RenderFrame* render_frame) override;
+  void RunScriptsAtDocumentIdle(content::RenderFrame* render_frame) override;
   void DidInitializeServiceWorkerContextOnWorkerThread(
       v8::Local<v8::Context> context,
       int64_t service_worker_version_id,
       const GURL& url) override;
   void WillDestroyServiceWorkerContextOnWorkerThread(
       v8::Local<v8::Context> context,
       int64_t service_worker_version_id,
       const GURL& url) override;
   bool ShouldEnforceWebRTCRoutingPreferences() override;
   GURL OverrideFlashEmbedWithHTML(const GURL& url) override;
@@ skipping 77 matching lines @@
   // Observes module load and unload events and notifies the ModuleDatabase in
   // the browser process.
   std::unique_ptr<ModuleWatcher> module_watcher_;
   mojom::ModuleEventSinkPtr module_event_sink_;
 #endif
 
   DISALLOW_COPY_AND_ASSIGN(ChromeContentRendererClient);
 };
 
 #endif  // CHROME_RENDERER_CHROME_CONTENT_RENDERER_CLIENT_H_