Plugin Power Saver: Improve Poster behavior for essential plugins.

chrome/renderer/plugins/chrome_plugin_placeholder.h

Index: chrome/renderer/plugins/chrome_plugin_placeholder.h
diff --git a/chrome/renderer/plugins/chrome_plugin_placeholder.h b/chrome/renderer/plugins/chrome_plugin_placeholder.h
index 85d49b7f3fb923f28b15f8415d052c07df67f945..236a607460f13c01624e23c15c50c3ea0447229d 100644
--- a/chrome/renderer/plugins/chrome_plugin_placeholder.h
+++ b/chrome/renderer/plugins/chrome_plugin_placeholder.h
@@ -15,9 +15,17 @@ 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;
 
@@ -45,7 +53,7 @@ class ChromePluginPlaceholder final
       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(