Defer loading of audio/video tags while prerendering.

chrome/renderer/chrome_content_renderer_client.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/renderer/chrome_content_renderer_client.h"
 
 #include <string>
 
 #include "base/command_line.h"
 #include "base/logging.h"
@@ skipping 31 matching lines @@
 #include "chrome/renderer/external_extension.h"
 #include "chrome/renderer/loadtimes_extension_bindings.h"
 #include "chrome/renderer/localized_error.h"
 #include "chrome/renderer/net/renderer_net_predictor.h"
 #include "chrome/renderer/page_click_tracker.h"
 #include "chrome/renderer/page_load_histograms.h"
 #include "chrome/renderer/plugins/blocked_plugin.h"
 #include "chrome/renderer/plugins/missing_plugin.h"
 #include "chrome/renderer/plugins/plugin_uma.h"
 #include "chrome/renderer/prerender/prerender_helper.h"
+#include "chrome/renderer/prerender/prerender_webmediaplayer.h"
 #include "chrome/renderer/print_web_view_helper.h"
 #include "chrome/renderer/renderer_histogram_snapshots.h"
 #include "chrome/renderer/safe_browsing/malware_dom_details.h"
 #include "chrome/renderer/safe_browsing/phishing_classifier_delegate.h"
 #include "chrome/renderer/search_extension.h"
 #include "chrome/renderer/searchbox.h"
 #include "chrome/renderer/searchbox_extension.h"
 #include "chrome/renderer/spellchecker/spellcheck.h"
 #include "chrome/renderer/spellchecker/spellcheck_provider.h"
 #include "chrome/renderer/translate_helper.h"
@@ skipping 203 matching lines @@
 
 bool ChromeContentRendererClient::OverrideCreatePlugin(
     content::RenderView* render_view,
     WebFrame* frame,
     const WebPluginParams& params,
     WebKit::WebPlugin** plugin) {
   *plugin = CreatePlugin(render_view, frame, params);
   return true;
 }
 
+bool ChromeContentRendererClient::OverrideCreateWebMediaPlayer(
+    content::RenderView* render_view,
+    WebKit::WebMediaPlayerClient* client,
+    base::WeakPtr<webkit_media::WebMediaPlayerDelegate> delegate,
+    media::FilterCollection* collection,
+    media::MessageLoopFactory* message_loop_factory,
+    webkit_media::MediaStreamClient* media_stream_client,
+    media::MediaLog* media_log,
+    webkit_media::WebMediaPlayerImpl** player) {
+  if (!prerender::PrerenderHelper::IsPrerendering(render_view)) {
+    *player = NULL;

[jam, 2011/12/05 22:40:17]

nit: since this is an override function and you're returning false, this
shouldn't be needed

[Shishir, 2011/12/05 22:46:20]

Done.

+    return false;
+  }
+  *player = new prerender::PrerenderWebMediaPlayer(render_view, client,
+      delegate, collection, message_loop_factory, media_stream_client,
+      media_log);
+  return true;
+}
+
 WebPlugin* ChromeContentRendererClient::CreatePlugin(
     content::RenderView* render_view,
     WebFrame* frame,
     const WebPluginParams& original_params) {
   CommandLine* cmd = CommandLine::ForCurrentProcess();
   GURL url(original_params.url);
   std::string orig_mime_type = original_params.mimeType.utf8();
   ChromeViewHostMsg_GetPluginInfo_Status status;
   webkit::WebPluginInfo plugin;
   std::string actual_mime_type;
@@ skipping 498 matching lines @@
 bool ChromeContentRendererClient::IsOtherExtensionWithWebRequestInstalled() {
   return extension_dispatcher_->IsOtherExtensionWithWebRequestInstalled();
 }
 
 void ChromeContentRendererClient::RegisterPPAPIInterfaceFactories(
     webkit::ppapi::PpapiInterfaceFactoryManager* factory_manager) {
   factory_manager->RegisterFactory(ChromePPAPIInterfaceFactory);
 }
 
 }  // namespace chrome