Mac: Add flag to force QTKit in otherwise AVFoundation-enabled builds/configs

media/base/media_switches.h

 // 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.
 
 // Defines all the "media" command-line switches.
 
 #ifndef MEDIA_BASE_MEDIA_SWITCHES_H_
 #define MEDIA_BASE_MEDIA_SWITCHES_H_
 
 #include "build/build_config.h"
@@ skipping 12 matching lines @@
 MEDIA_EXPORT extern const char kMediaDrmEnableNonCompositing[];
 #endif
 
 #if defined(OS_LINUX) || defined(OS_FREEBSD) || defined(OS_SOLARIS)
 MEDIA_EXPORT extern const char kAlsaInputDevice[];
 MEDIA_EXPORT extern const char kAlsaOutputDevice[];
 #endif
 
 #if defined(OS_MACOSX)
 MEDIA_EXPORT extern const char kEnableAVFoundation[];
+MEDIA_EXPORT extern const char kForceQTKit[];
 #endif
 
 #if defined(OS_WIN)
 MEDIA_EXPORT extern const char kEnableExclusiveAudio[];
 MEDIA_EXPORT extern const char kForceDirectShowVideoCapture[];
 MEDIA_EXPORT extern const char kForceMediaFoundationVideoCapture[];
 MEDIA_EXPORT extern const char kForceWaveAudio[];
 MEDIA_EXPORT extern const char kTrySupportedChannelLayouts[];
 MEDIA_EXPORT extern const char kWaveOutBuffers[];
 #endif
 
 #if defined(USE_CRAS)
 MEDIA_EXPORT extern const char kUseCras[];
 #endif
 
 MEDIA_EXPORT extern const char kUseFileForFakeVideoCapture[];
 
 }  // namespace switches
 
 #endif  // MEDIA_BASE_MEDIA_SWITCHES_H_