Bring Audio Share and Tab Share Default On

chrome/browser/media/desktop_capture_access_handler.cc

 // Copyright 2015 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/media/desktop_capture_access_handler.h"
 
 #include <utility>
 
 #include "base/command_line.h"
 #include "base/strings/string_number_conversions.h"
@@ skipping 348 matching lines @@
       request.audio_type == content::MEDIA_DESKTOP_AUDIO_CAPTURE;
 
   // This value shows for a given capture type, whether the system or our code
   // can support audio sharing. Currently audio is only supported for screen and
   // tab/webcontents capture streams.
   const bool audio_supported =
       (media_id.type == content::DesktopMediaID::TYPE_SCREEN &&
        loopback_audio_supported) ||
       media_id.type == content::DesktopMediaID::TYPE_WEB_CONTENTS;
 
-  const bool has_flag = base::CommandLine::ForCurrentProcess()->HasSwitch(
-      extensions::switches::kEnableDesktopCaptureAudio);
+  const bool check_audio_permission =
+      !base::CommandLine::ForCurrentProcess()->HasSwitch(
+          extensions::switches::kDisableDesktopCaptureAudio);
   const bool capture_audio =
-      (has_flag ? audio_permitted : true) && audio_requested && audio_supported;
+      (check_audio_permission ? audio_permitted : true) && audio_requested &&
+      audio_supported;
 
   ui = GetDevicesForDesktopCapture(&devices, media_id, capture_audio, true,
                                    GetApplicationTitle(web_contents, extension),
                                    base::UTF8ToUTF16(original_extension_name));
 
   callback.Run(devices, content::MEDIA_DEVICE_OK, std::move(ui));
 }
 
 void DesktopCaptureAccessHandler::UpdateMediaRequestState(
     int render_process_id,
@@ skipping 22 matching lines @@
         desktop_capture_sessions_.erase(it);
         break;
       }
     }
   }
 }
 
 bool DesktopCaptureAccessHandler::IsCaptureInProgress() {
   return desktop_capture_sessions_.size() > 0;
 }