Plugin Power Saver: Throttle 'large' plugins that appear small.

content/public/renderer/plugin_instance_throttler.h

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_PUBLIC_RENDERER_PLUGIN_INSTANCE_THROTTLER_H_
 #define CONTENT_PUBLIC_RENDERER_PLUGIN_INSTANCE_THROTTLER_H_
 
 #include "base/macros.h"
 #include "base/memory/scoped_ptr.h"
 #include "content/common/content_export.h"
 
 namespace blink {
 class WebPlugin;
 struct WebPluginParams;
 }
 
+namespace gfx {
+class Size;
+}
+
 class GURL;
 class SkBitmap;
 
 namespace content {
 
 // This class manages the metric collection, throttling, and unthrottling of a
 // single peripheral plugin instance. If the Power Saver feature is disabled,
 // the plugin instance will never actually be throttled, but still collects
 // user interaction metrics.
 //
@@ skipping 50 matching lines @@
   virtual bool IsHiddenForPlaceholder() const = 0;
 
   // Marks the plugin as essential. Unthrottles the plugin if already throttled.
   virtual void MarkPluginEssential(PowerSaverUnthrottleMethod method) = 0;
 
   // Called by the placeholder when the plugin should temporarily be hidden.
   virtual void SetHiddenForPlaceholder(bool hidden) = 0;
 
   virtual blink::WebPlugin* GetWebPlugin() const = 0;
 
+  // Gets the throttler's best estimate of the plugin's visible dimensions.
+  virtual const gfx::Size& GetSize() const = 0;
+
   // Throttler needs to know when the plugin audio is throttled, as this may
   // prevent the plugin from generating new frames.
   virtual void NotifyAudioThrottled() = 0;
 
  protected:
   PluginInstanceThrottler() {}
 
  private:
   DISALLOW_COPY_AND_ASSIGN(PluginInstanceThrottler);
 };
 }
 
 #endif  // CONTENT_PUBLIC_RENDERER_PLUGIN_INSTANCE_THROTTLER_H_