[Cocoa] Tab audio mute control, behind a switch (off by default).

chrome/browser/about_flags.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 "chrome/browser/about_flags.h"
 
 #include <iterator>
 #include <map>
 #include <set>
 #include <utility>
@@ skipping 1947 matching lines @@
 #endif
 #if defined(OS_CHROMEOS)
   {
     "wake-on-packets",
     IDS_FLAGS_WAKE_ON_PACKETS_NAME,
     IDS_FLAGS_WAKE_ON_PACKETS_DESCRIPTION,
     kOsCrOSOwnerOnly,
     SINGLE_VALUE_TYPE(chromeos::switches::kWakeOnPackets)
   },
 #endif  // OS_CHROMEOS
-#if defined(USE_AURA)
   {
     "enable-tab-audio-muting",
     IDS_FLAGS_ENABLE_TAB_AUDIO_MUTING_NAME,
     IDS_FLAGS_ENABLE_TAB_AUDIO_MUTING_DESCRIPTION,
-    kOsWin | kOsLinux | kOsCrOS,
+    kOsDesktop,
     SINGLE_VALUE_TYPE(switches::kEnableTabAudioMuting)
   },
-#endif  // defined(USE_AURA)
   {
     "enable-credential-manager-api",
     IDS_FLAGS_CREDENTIAL_MANAGER_API_NAME,
     IDS_FLAGS_CREDENTIAL_MANAGER_API_DESCRIPTION,
     kOsAll,
     SINGLE_VALUE_TYPE(switches::kEnableCredentialManagerAPI)
   },
 #if defined(ENABLE_PLUGINS)
   {
     "enable-plugin-power-saver",
@@ skipping 606 matching lines @@
 }
 
 const Experiment* GetExperiments(size_t* count) {
   *count = num_experiments;
   return experiments;
 }
 
 }  // namespace testing
 
 }  // namespace about_flags