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

chrome/browser/flag_descriptions.h

 // Copyright 2017 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.
 
 #ifndef CHROME_BROWSER_FLAG_DESCRIPTIONS_H_
 #define CHROME_BROWSER_FLAG_DESCRIPTIONS_H_
 
 // Includes needed for macros allowing conditional compilation of some strings.
 #include "build/build_config.h"
 #include "build/buildflag.h"
@@ skipping 2864 matching lines @@
 // Name for the flag to enable expensive background timer throttling
 extern const char kExpensiveBackgroundTimerThrottlingName[];
 
 // Description for the flag to enable expensive background timer throttling
 extern const char kExpensiveBackgroundTimerThrottlingDescription[];
 
 //  Enable default MediaSession flag
 
 #if !defined(OS_ANDROID)
 
-// Name for the flag to enable default MediaSession on desktop
-extern const char kEnableDefaultMediaSessionName[];
+// Name for the flag to enable audio focus on desktop.
+extern const char kEnableAudioFocusName[];
 
-// Desciption for the flag to enable default MediaSession on desktop
-extern const char kEnableDefaultMediaSessionDescription[];
+// Desciption for the flag to enable audio focus on desktop.
+extern const char kEnableAudioFocusDescription[];
 
-// Option for disabling the default MediaSession
-extern const char kEnableDefaultMediaSessionDisabled[];
+// Option for disabling audio focus on desktop.
+extern const char kEnableAudioFocusDisabled[];
 
-// Option for enabling the default MediaSession
-extern const char kEnableDefaultMediaSessionEnabled[];
+// Option for enabling audio focus on desktop.
+extern const char kEnableAudioFocusEnabled[];
 
-// Option for enabling the default MediaSession with Flash
-extern const char kEnableDefaultMediaSessionEnabledDuckFlash[];
+// Option for enabling audio focus with Flash support on desktop.
+extern const char kEnableAudioFocusEnabledDuckFlash[];
 
 #endif  // !defined(OS_ANDROID)
 
 #if defined(OS_WIN)
 
 // Name for the flag that enables using GDI to print text
 extern const char kGdiTextPrinting[];
 
 // Description of the flag that enables using GDI to print text.
 extern const char kGdiTextPrintingDescription[];
@@ skipping 495 matching lines @@
 // a hard-reload.
 extern const char kLocationHardReloadDescription[];
 
 // Name and description for the capture-thumbnail-on-load-finished flag.
 extern const char kCaptureThumbnailOnLoadFinishedName[];
 extern const char kCaptureThumbnailOnLoadFinishedDescription[];
 
 }  // namespace flag_descriptions
 
 #endif  // CHROME_BROWSER_FLAG_DESCRIPTIONS_H_