Remove Media.AcceleratedCompositingActive UMA.

content/renderer/media/webmediaplayer_impl.h

 // Copyright 2013 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_RENDERER_MEDIA_WEBMEDIAPLAYER_IMPL_H_
 #define CONTENT_RENDERER_MEDIA_WEBMEDIAPLAYER_IMPL_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 282 matching lines @@
   // Tracks whether to issue time changed notifications during buffering state
   // changes.
   bool should_notify_time_changed_;
 
   blink::WebMediaPlayerClient* client_;
 
   base::WeakPtr<WebMediaPlayerDelegate> delegate_;
 
   base::Callback<void(const base::Closure&)> defer_load_cb_;
 
-  // Since accelerated compositing status is only known after the first layout,
-  // we delay reporting it to UMA until that time.
-  bool accelerated_compositing_reported_;
-
   bool incremented_externally_allocated_memory_;
 
   // Factories for supporting video accelerators. May be null.
   scoped_refptr<media::GpuVideoAcceleratorFactories> gpu_factories_;
 
   // Routes audio playback to either AudioRendererSink or WebAudio.
   scoped_refptr<WebAudioSourceProviderImpl> audio_source_provider_;
 
   bool supports_save_;
 
@@ skipping 33 matching lines @@
   WebContentDecryptionModuleImpl* web_cdm_;
 
   media::DecryptorReadyCB decryptor_ready_cb_;
 
   DISALLOW_COPY_AND_ASSIGN(WebMediaPlayerImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_MEDIA_WEBMEDIAPLAYER_IMPL_H_