Remove deprecated media switches.

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";
 
-// Disables Opus playback in media elements.
-const char kDisableOpusPlayback[] = "disable-opus-playback";
-
-// Disables VP8 Alpha playback in media elements.
-const char kDisableVp8AlphaPlayback[] = "disable-vp8-alpha-playback";
-
 // Set number of threads to use for video decoding.
 const char kVideoThreads[] = "video-threads";
 
 // Enables ADTS stream parser for Media Source Extensions.
 const char kEnableADTSStreamParser[] = "enable-adts-stream-parser";
 
 // Enables MP3 stream parser for Media Source Extensions.
 const char kEnableMP3StreamParser[] = "enable-mp3-stream-parser";
 
 #if defined(OS_ANDROID)
 // Disables the infobar popup for accessing protected media identifier.
 const char kDisableInfobarForProtectedMediaIdentifier[] =
     "disable-infobar-for-protected-media-identifier";
 
 // Enables use of non-compositing MediaDrm decoding by default for Encrypted
 // Media Extensions implementation.
 const char kMediaDrmEnableNonCompositing[] = "mediadrm-enable-non-compositing";
 #endif
 
 #if defined(OS_LINUX) || defined(OS_FREEBSD) || defined(OS_SOLARIS)
 // The Alsa device to use when opening an audio input stream.
 const char kAlsaInputDevice[] = "alsa-input-device";
 // The Alsa device to use when opening an audio stream.
 const char kAlsaOutputDevice[] = "alsa-output-device";
 #endif
 
 #if defined(OS_MACOSX)
-// Unlike other platforms, OSX requires CoreAudio calls to happen on the main
-// thread of the process.  Provide a way to disable this until support is well
-// tested.  See http://crbug.com/158170.
-// TODO(dalecurtis): Remove this once we're sure nothing has exploded.
-const char kDisableMainThreadAudio[] = "disable-main-thread-audio";
 // AVFoundation is available in versions 10.7 and onwards, and is to be used
 // http://crbug.com/288562 for both audio and video device monitoring and for
 // video capture. Being a dynamically loaded NSBundle and library, it hits the
 // Chrome startup time (http://crbug.com/311325 and http://crbug.com/311437);
 // for experimentation purposes, in particular library load time issue, the
 // usage of this library can be hidden behind this flag.
 const char kDisableAVFoundation[] = "disable-avfoundation";
 #endif
 
 #if defined(OS_WIN)
@@ skipping 34 matching lines @@
 const char kUseCras[] = "use-cras";
 #endif
 
 // Disables system sounds manager.
 const char kDisableSystemSoundsManager[] = "disable-system-sounds-manager";
 
 // Use a raw video file as fake video capture device.
 const char kUseFileForFakeVideoCapture[] = "use-file-for-fake-video-capture";
 
 }  // namespace switches