Plugin Power Saver: Do not always throttle plugins with posters.

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 d8afb4a9b6df144f67619ab7a8b3e6fb2fad4782..bd2b9ef307693b098a24ea73fb590daa60039615 100644
--- a/content/public/renderer/plugin_instance_throttler.h
+++ b/content/public/renderer/plugin_instance_throttler.h
@@ -47,6 +47,7 @@ class CONTENT_EXPORT PluginInstanceThrottler {
   // How the throttled power saver is unthrottled, if ever.
   // These numeric values are used in UMA logs; do not change them.
   enum PowerSaverUnthrottleMethod {
+    UNTHROTTLE_METHOD_DO_NOT_RECORD = -1,  // Sentinel value to skip recording.
     UNTHROTTLE_METHOD_NEVER = 0,
     UNTHROTTLE_METHOD_BY_CLICK = 1,
     UNTHROTTLE_METHOD_BY_WHITELIST = 2,
@@ -74,10 +75,6 @@ class CONTENT_EXPORT PluginInstanceThrottler {
 
   static void RecordUnthrottleMethodMetric(PowerSaverUnthrottleMethod method);
 
-  // Returns true if content is considered "large", and thus essential.
-  // |width| and |height| are zoom and device scale independent logical pixels.
-  static bool IsLargeContent(int width, int height);
-
   virtual ~PluginInstanceThrottler() {}
 
   virtual void AddObserver(Observer* observer) = 0;