Remove --enable-audible-notifications flag for feature launch.

content/public/common/content_switches.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 "content/public/common/content_switches.h"
 
 namespace switches {
 
 // By default, file:// URIs cannot read other file:// URIs. This is an
 // override for developers who need the old behavior for testing.
@@ skipping 326 matching lines @@
     "enable-accelerated-overflow-scroll";
 
 // Enables accelerated compositing for scrollable frames for accelerated
 // scrolling for them. Requires kForceCompositingMode.
 const char kEnableAcceleratedScrollableFrames[] =
      "enable-accelerated-scrollable-frames";
 
 // Turns on extremely verbose logging of accessibility events.
 const char kEnableAccessibilityLogging[]    = "enable-accessibility-logging";
 
-// Enable notifications of audible/silent audio output from a render view.
-//
-// TODO(miu): Remove --enable-audible-notifications once the feature goes
-// live.  http://crbug.com/178934
-const char kEnableAudibleNotifications[]    = "enable-audible-notifications";
-
 // Use a begin frame signal from browser to renderer to schedule rendering.
 const char kEnableBeginFrameScheduling[]    = "enable-begin-frame-scheduling";
 
 // Enables browser plugin for all types of pages.
 const char kEnableBrowserPluginForAllViewTypes[] =
     "enable-browser-plugin-for-all-view-types";
 
 // Enables Drag and Drop into and out of Browser Plugin.
 // kEnableBrowserPluginGuestViews must also be set at this time.
 const char kEnableBrowserPluginDragDrop[]   = "enable-browser-plugin-drag-drop";
@@ skipping 638 matching lines @@
 #endif
 
 #if defined(USE_AURA)
 // Forces usage of the test compositor. Needed to run ui tests on bots.
 extern const char kTestCompositor[]         = "test-compositor";
 #endif
 
 // Don't dump stuff here, follow the same order as the header.
 
 }  // namespace switches