remove unused kDisableMediaHistoryLogging flags

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"
 
 #include "base/command_line.h"
 
 namespace switches {
 
@@ skipping 942 matching lines @@
 
 #if defined(OS_ANDROID)
 // Disable user gesture requirement for the media element to enter fullscreen.
 const char kDisableGestureRequirementForMediaFullscreen[] =
     "disable-gesture-requirement-for-media-fullscreen";
 
 // Disable user gesture requirement for media playback.
 const char kDisableGestureRequirementForMediaPlayback[] =
     "disable-gesture-requirement-for-media-playback";
 
-// Disable history logging for media elements.
-const char kDisableMediaHistoryLogging[]    = "disable-media-history";
-
 // Disable the click delay by sending click events during double tap.
 const char kDisableClickDelay[]             = "disable-click-delay";
 
 // Disable overscroll edge effects like those found in Android views.
 const char kDisableOverscrollEdgeEffect[]   = "disable-overscroll-edge-effect";
 
 // WebRTC is enabled by default on Android.
 const char kDisableWebRTC[]                 = "disable-webrtc";
 
 // Enable the recognition part of the Web Speech API.
@@ skipping 23 matching lines @@
 
 // Disables support for Core Animation plugins. This is triggered when
 // accelerated compositing is disabled. See http://crbug.com/122430 .
 const char kDisableCoreAnimationPlugins[] =
     "disable-core-animation-plugins";
 #endif
 
 // Don't dump stuff here, follow the same order as the header.
 
 }  // namespace switches