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 29 matching lines @@
 #include "chrome/renderer/extensions/extension_resource_request_policy.h"
 #include "chrome/renderer/extensions/renderer_extension_bindings.h"
 #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/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 212 matching lines @@
       const WebPluginParams& params,
       WebKit::WebPlugin** plugin) {
   bool is_default_plugin;
   *plugin = CreatePlugin(render_view, frame, params, &is_default_plugin);
   if (!*plugin || is_default_plugin)
     MissingPluginReporter::GetInstance()->ReportPluginMissing(
         params.mimeType.utf8(), params.url);
   return true;
 }
 
+bool ChromeContentRendererClient::ShouldOverrideCreateWebMediaPlayer(
+    RenderView* view) {
+  return prerender::PrerenderHelper::IsPrerendering(view);
+}
+
+void ChromeContentRendererClient::OverrideCreateWebMediaPlayer(
+    RenderView* render_view,
+    WebKit::WebMediaPlayerClient* client,
+    media::FilterCollection* collection,
+    media::MessageLoopFactory* message_loop_factory,
+    webkit_glue::MediaStreamClient* media_stream_client,
+    media::MediaLog* media_log,
+    webkit_glue::WebMediaPlayerImpl** player) {
+  DCHECK(ShouldOverrideCreateWebMediaPlayer(render_view));
+  *player = new prerender::PrerenderWebMediaPlayer(render_view, client,
+      collection, message_loop_factory, media_stream_client, media_log);
+}
+
 WebPlugin* ChromeContentRendererClient::CreatePlugin(
       RenderView* render_view,
       WebFrame* frame,
       const WebPluginParams& original_params,
       bool* is_default_plugin) {
   *is_default_plugin = false;
   CommandLine* cmd = CommandLine::ForCurrentProcess();
   webkit::WebPluginInfo info;
   GURL url(original_params.url);
   std::string orig_mime_type = original_params.mimeType.utf8();
@@ skipping 471 matching lines @@
   if (spellcheck_.get())
     thread->RemoveObserver(spellcheck_.get());
   SpellCheck* new_spellcheck = new SpellCheck();
   if (spellcheck_provider_)
     spellcheck_provider_->SetSpellCheck(new_spellcheck);
   spellcheck_.reset(new_spellcheck);
   thread->AddObserver(new_spellcheck);
 }
 
 }  // namespace chrome