Plugin Power Saver: Improve Poster behavior for essential plugins.

chrome/renderer/plugins/chrome_plugin_placeholder.h

 // 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.
 
 #ifndef CHROME_RENDERER_PLUGINS_CHROME_PLUGIN_PLACEHOLDER_H_
 #define CHROME_RENDERER_PLUGINS_CHROME_PLUGIN_PLACEHOLDER_H_
 
 #include "components/plugins/renderer/loadable_plugin_placeholder.h"
 #include "content/public/renderer/context_menu_client.h"
 #include "content/public/renderer/render_process_observer.h"
 
 namespace gfx {
 class Size;
 }
 
 enum class ChromeViewHostMsg_GetPluginInfo_Status;
 
-// This contains information specifying the poster image of plugin placeholders.
-// The default constructor specifies no poster image.
-struct PlaceholderPosterInfo {
+// This contains information specifying the plugin's Power Saver behavior.
+// The default constructor has Plugin Power Saver disabled.
+struct PowerSaverInfo {
+  PowerSaverInfo();
+
+  // Whether power saver should be enabled.
+  bool power_saver_enabled;
+
+  // Whether the plugin should be deferred because it is in a background tab.
+  bool blocked_for_background_tab;
+
   // The poster image specified in image 'srcset' attribute format.
   std::string poster_attribute;
 
   // Used to resolve relative paths in |poster_attribute|.
   GURL base_url;
 
   // Specify this to provide partially obscured plugins a centered poster image.
   gfx::Size custom_poster_size;
 };
 
 class ChromePluginPlaceholder final
     : public plugins::LoadablePluginPlaceholder,
       public content::RenderProcessObserver,
       public content::ContextMenuClient,
       public gin::Wrappable<ChromePluginPlaceholder> {
  public:
   static gin::WrapperInfo kWrapperInfo;
 
   static ChromePluginPlaceholder* CreateBlockedPlugin(
       content::RenderFrame* render_frame,
       blink::WebLocalFrame* frame,
       const blink::WebPluginParams& params,
       const content::WebPluginInfo& info,
       const std::string& identifier,
       const base::string16& name,
       int resource_id,
       const base::string16& message,
-      const PlaceholderPosterInfo& poster_info);
+      const PowerSaverInfo& power_saver_info);
 
   // Creates a new WebViewPlugin with a MissingPlugin as a delegate.
   static ChromePluginPlaceholder* CreateLoadableMissingPlugin(
       content::RenderFrame* render_frame,
       blink::WebLocalFrame* frame,
       const blink::WebPluginParams& params);
 
   void SetStatus(ChromeViewHostMsg_GetPluginInfo_Status status);
 
 #if defined(ENABLE_PLUGIN_INSTALLATION)
@@ skipping 54 matching lines @@
 #endif
 
   bool has_host_;
   int context_menu_request_id_;  // Nonzero when request pending.
   base::string16 plugin_name_;
 
   DISALLOW_COPY_AND_ASSIGN(ChromePluginPlaceholder);
 };
 
 #endif  // CHROME_RENDERER_PLUGINS_CHROME_PLUGIN_PLACEHOLDER_H_