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

chrome/browser/ui/tabs/tab_utils.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/ui/tabs/tab_utils.h"
 
 #include "base/command_line.h"
 #include "base/strings/string16.h"
 #include "chrome/browser/media/media_capture_devices_dispatcher.h"
 #include "chrome/browser/media/media_stream_capture_indicator.h"
@@ skipping 216 matching lines @@
           l10n_util::GetStringUTF16(IDS_TOOLTIP_TAB_MEDIA_STATE_CAPTURING));
       break;
     case TAB_MEDIA_STATE_NONE:
       NOTREACHED();
       break;
   }
   return result;
 }
 
 bool IsTabAudioMutingFeatureEnabled() {
-#if defined(USE_AURA)
   return base::CommandLine::ForCurrentProcess()->HasSwitch(
       switches::kEnableTabAudioMuting);
-#else
-  return false;
-#endif
 }
 
 bool CanToggleAudioMute(content::WebContents* contents) {
   switch (GetTabMediaStateForContents(contents)) {
     case TAB_MEDIA_STATE_NONE:
     case TAB_MEDIA_STATE_AUDIO_PLAYING:
     case TAB_MEDIA_STATE_AUDIO_MUTING:
       return IsTabAudioMutingFeatureEnabled();
     case TAB_MEDIA_STATE_RECORDING:
     case TAB_MEDIA_STATE_CAPTURING:
@@ skipping 17 matching lines @@
                      const std::vector<int>& indices) {
   for (std::vector<int>::const_iterator i = indices.begin(); i != indices.end();
        ++i) {
     if (!IsTabAudioMuted(tab_strip.GetWebContentsAt(*i)))
       return false;
   }
   return true;
 }
 
 }  // namespace chrome