Rename --enable-default-media-session to --enable-audio-focus.

content/browser/media/session/audio_focus_delegate_default_browsertest.cc

 // Copyright 2016 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 "base/command_line.h"
 #include "content/browser/media/session/media_session_impl.h"
 #include "content/browser/media/session/mock_media_session_player_observer.h"
 #include "content/public/test/content_browser_test.h"
 #include "content/shell/browser/shell.h"
 #include "media/base/media_content_type.h"
 #include "media/base/media_switches.h"
 
 namespace content {
 
 class AudioFocusDelegateDefaultBrowserTest : public ContentBrowserTest {
  protected:
   void SetUpCommandLine(base::CommandLine* command_line) override {
-    command_line->AppendSwitch(switches::kEnableDefaultMediaSession);
+    command_line->AppendSwitch(switches::kEnableAudioFocus);
   }
 
   void Run(WebContents* start_contents, WebContents* interrupt_contents) {
     std::unique_ptr<MockMediaSessionPlayerObserver>
         player_observer(new MockMediaSessionPlayerObserver);
 
     MediaSessionImpl* media_session = MediaSessionImpl::Get(start_contents);
     ASSERT_TRUE(media_session);
 
     MediaSessionImpl* other_media_session =
@@ skipping 29 matching lines @@
   Run(shell()->web_contents(), CreateOffTheRecordBrowser()->web_contents());
 }
 
 // OffTheRecord BrowserContext is interrupted by regular one.
 IN_PROC_BROWSER_TEST_F(AudioFocusDelegateDefaultBrowserTest,
                        OffTheRecordInterruptsRegular) {
   Run(CreateOffTheRecordBrowser()->web_contents(), shell()->web_contents());
 }
 
 }  // namespace content