media: Remove VP9 flag, and enable VP9 support by default.

media/base/media_switches.cc

 // Copyright (c) 2012 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.
 
 #include "media/base/media_switches.h"
 
 namespace switches {
 
 // Allow users to specify a custom buffer size for debugging purpose.
 const char kAudioBufferSize[] = "audio-buffer-size";
 
 // Enable EAC3 playback in MSE.
 const char kEnableEac3Playback[] = "enable-eac3-playback";
 
 // Enables Opus playback in media elements.
 const char kEnableOpusPlayback[] = "enable-opus-playback";
 
 // Enables VP8 Alpha playback in media elements.
 const char kEnableVp8AlphaPlayback[] = "enable-vp8-alpha-playback";
 
-// Enables VP9 playback in media elements.
-const char kEnableVp9Playback[] = "enable-vp9-playback";
-
 // Set number of threads to use for video decoding.
 const char kVideoThreads[] = "video-threads";
 
 #if defined(GOOGLE_TV)
 // Use external video surface for video with more than or equal pixels to
 // specified value. For example, value of 0 will enable external video surface
 // for all videos, and value of 921600 (=1280*720) will enable external video
 // surface for 720p video and larger.
 const char kUseExternalVideoSurfaceThresholdInPixels[] =
     "use-external-video-surface-threshold-in-pixels";
@@ skipping 28 matching lines @@
 // Number of buffers to use for WaveOut.
 const char kWaveOutBuffers[] = "waveout-buffers";
 #endif
 
 #if defined(USE_CRAS)
 // Use CRAS, the ChromeOS audio server.
 const char kUseCras[] = "use-cras";
 #endif
 
 }  // namespace switches