Plugin Power Saver: Implement srcset syntax for posters.

chrome/renderer/plugins/chrome_plugin_placeholder.cc

 // Copyright 2013 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/plugins/chrome_plugin_placeholder.h"
 
 #include "base/strings/utf_string_conversions.h"
 #include "base/values.h"
 #include "chrome/common/prerender_messages.h"
 #include "chrome/common/render_messages.h"
@@ skipping 135 matching lines @@
 // static
 ChromePluginPlaceholder* ChromePluginPlaceholder::CreateBlockedPlugin(
     content::RenderFrame* render_frame,
     WebLocalFrame* frame,
     const WebPluginParams& params,
     const content::WebPluginInfo& info,
     const std::string& identifier,
     const base::string16& name,
     int template_id,
     const base::string16& message,
-    const GURL& poster_url) {
+    const std::string& poster_attribute,
+    const GURL& base_url) {
   base::DictionaryValue values;
   values.SetString("message", message);
   values.SetString("name", name);
   values.SetString("hide", l10n_util::GetStringUTF8(IDS_PLUGIN_HIDE));
 
-  if (poster_url.is_valid())
-    values.SetString("background", "url('" + poster_url.spec() + "')");
+  if (!poster_attribute.empty()) {
+    values.SetString("poster", poster_attribute);
+    values.SetString("baseurl", base_url.spec());
+  }
 
   const base::StringPiece template_html(
       ResourceBundle::GetSharedInstance().GetRawDataResource(template_id));
 
   DCHECK(!template_html.empty()) << "unable to load template. ID: "
                                  << template_id;
   std::string html_data = webui::GetI18nTemplateHtml(template_html, &values);
 
   // |blocked_plugin| will destroy itself when its WebViewPlugin is going away.
   ChromePluginPlaceholder* blocked_plugin = new ChromePluginPlaceholder(
       render_frame, frame, params, html_data, name);
 
 #if defined(ENABLE_PLUGINS)
-  if (poster_url.is_valid())
+  if (!poster_attribute.empty())
     blocked_plugin->BlockForPowerSaverPoster();
 #endif
   blocked_plugin->SetPluginInfo(info);
   blocked_plugin->SetIdentifier(identifier);
   return blocked_plugin;
 }
 
 void ChromePluginPlaceholder::SetStatus(
     const ChromeViewHostMsg_GetPluginInfo_Status& status) {
   status_->value = status.value;
@@ skipping 186 matching lines @@
   v8::Handle<v8::Object> global = context->Global();
   global->Set(gin::StringToV8(isolate, "plugin"),
               gin::CreateHandle(isolate, this).ToV8());
 }
 
 gin::ObjectTemplateBuilder ChromePluginPlaceholder::GetObjectTemplateBuilder(
     v8::Isolate* isolate) {
   return LoadablePluginPlaceholder::GetObjectTemplateBuilder(isolate).SetMethod(
       "openAboutPlugins", &ChromePluginPlaceholder::OpenAboutPluginsCallback);
 }