Plugin Power Saver: Implement size-based heuristic for peripheral content.

content/browser/web_contents/web_contents_impl.h

Index: content/browser/web_contents/web_contents_impl.h
diff --git a/content/browser/web_contents/web_contents_impl.h b/content/browser/web_contents/web_contents_impl.h
index 07142af90f19bac111f3bc8e89c2b85da5e6529d..e5027967a2051e5a598d35cc7c797502a70a8585 100644
--- a/content/browser/web_contents/web_contents_impl.h
+++ b/content/browser/web_contents/web_contents_impl.h
@@ -57,6 +57,7 @@ class InterstitialPageImpl;
 class JavaScriptDialogManager;
 class ManifestManagerHost;
 class MidiDispatcherHost;
+class PluginContentOriginWhitelist;
 class PowerSaveBlocker;
 class RenderViewHost;
 class RenderViewHostDelegateView;
@@ -1163,6 +1164,11 @@ class CONTENT_EXPORT WebContentsImpl
   // NULL otherwise.
   scoped_ptr<BrowserPluginGuest> browser_plugin_guest_;
 
+#if defined(ENABLE_PLUGINS)
+  // Manages the whitelist of plugin content origins exempt from power saving.
+  scoped_ptr<PluginContentOriginWhitelist> plugin_content_origin_whitelist_;
+#endif
+
   // This must be at the end, or else we might get notifications and use other
   // member variables that are gone.
   NotificationRegistrar registrar_;