Plugin Power Saver: Unthrottle dynamically sized plugins correctly.

content/public/renderer/plugin_instance_throttler.h

Index: content/public/renderer/plugin_instance_throttler.h
diff --git a/content/public/renderer/plugin_instance_throttler.h b/content/public/renderer/plugin_instance_throttler.h
index 025ccbd8a8a410610321c5d1ac2ee03e4e30df66..21ac9c2a96cb427ac0584ea836e818498c46ceaa 100644
--- a/content/public/renderer/plugin_instance_throttler.h
+++ b/content/public/renderer/plugin_instance_throttler.h
@@ -52,6 +52,7 @@ class CONTENT_EXPORT PluginInstanceThrottler {
     UNTHROTTLE_METHOD_BY_CLICK = 1,
     UNTHROTTLE_METHOD_BY_WHITELIST = 2,
     UNTHROTTLE_METHOD_BY_AUDIO = 3,
+    UNTHROTTLE_METHOD_BY_SIZE_CHANGE = 4,
     UNTHROTTLE_METHOD_NUM_ITEMS
   };
 
@@ -74,6 +75,9 @@ class CONTENT_EXPORT PluginInstanceThrottler {
 
   static void RecordUnthrottleMethodMetric(PowerSaverUnthrottleMethod method);
 
+  // Returns true if content is considered "large", and thus essential.
+  static bool IsLargeContent(int width, int height);
+
   virtual ~PluginInstanceThrottler() {}
 
   virtual void AddObserver(Observer* observer) = 0;