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 db6d121b676f9dde0ebbdff02b0c230c6fe194dd..302b814d41333d91bb0fdf90c8bdb1c872dee4b8 100644
--- a/content/browser/web_contents/web_contents_impl.h
+++ b/content/browser/web_contents/web_contents_impl.h
@@ -773,6 +773,7 @@ class CONTENT_EXPORT WebContentsImpl
                           bool is_hung);
   void OnPluginCrashed(const base::FilePath& plugin_path,
                        base::ProcessId plugin_pid);
+  void OnPluginContentOriginAllowed(const GURL& content_origin);
 #endif
   void OnDomOperationResponse(const std::string& json_string,
                               int automation_id);
@@ -998,6 +999,12 @@ class CONTENT_EXPORT WebContentsImpl
   scoped_ptr<PowerSaveBlocker> audio_power_save_blocker_;
   scoped_ptr<PowerSaveBlocker> video_power_save_blocker_;
 
+#if defined(ENABLE_PLUGINS)
+  // Plugin content origins that have been whitelisted.

[Charlie Reis, 2014/10/30 22:13:16]

It's not clear from the comment what these have been whitelisted for.  Please
elaborate.

[tommycli, 2014/10/31 00:01:21]

Done.

+  typedef std::set<GURL> PluginContentOriginSet;
+  PluginContentOriginSet plugin_content_origin_whitelist_;

[Charlie Reis, 2014/10/30 22:13:16]

I'm wondering if this belongs on a WebContentsObserver rather than baked into
WebContents itself.  Would that make sense?

[tommycli, 2014/10/31 00:01:22]

Done.

+#endif
+
   // Manages the frame tree of the page and process swaps in each node.
   FrameTree frame_tree_;