[Android] Added a runtime flag to enable autoplay of muted videos.

chrome/browser/about_flags.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 "chrome/browser/about_flags.h"
 
 #include <iterator>
 #include <map>
 #include <set>
 #include <utility>
@@ skipping 1875 matching lines @@
      ENABLE_DISABLE_VALUE_TYPE(switches::kEnableFullscreenTabDetaching,
                                switches::kDisableFullscreenTabDetaching)},
 #endif
 #if defined(OS_ANDROID)
     {"media-style-notification", IDS_FLAGS_MEDIA_STYLE_NOTIFICATION_NAME,
      IDS_FLAGS_MEDIA_STYLE_NOTIFICATION_DESCRIPTION, kOsAndroid,
      FEATURE_VALUE_TYPE(chrome::android::kMediaStyleNotification)},
     {"important-sites-in-cbd", IDS_FLAGS_IMPORTANT_SITES_IN_CBD_NAME,
      IDS_FLAGS_IMPORTANT_SITES_IN_CBD_DESCRIPTION, kOsAndroid,
      FEATURE_VALUE_TYPE(chrome::android::kImportantSitesInCBD)},
+    {"enable-autoplay-muted-videos",
+     IDS_FLAGS_ENABLE_AUTOPLAY_MUTED_VIDEOS_NAME,
+     IDS_FLAGS_ENABLE_AUTOPLAY_MUTED_VIDEOS_DESCRIPTION,
+     kOsAndroid,
+     SINGLE_VALUE_TYPE(switches::kEnableAutoplayMutedVideos)},
 #endif
     {"enable-pointer-events",  // FLAGS:RECORD_UMA
      IDS_FLAGS_EXPERIMENTAL_POINTER_EVENT_NAME,
      IDS_FLAGS_EXPERIMENTAL_POINTER_EVENT_DESCRIPTION, kOsAll,
      FEATURE_VALUE_TYPE(features::kPointerEvents)},
     {"passive-listener-default",  // FLAGS:RECORD_UMA
      IDS_FLAGS_PASSIVE_EVENT_LISTENER_DEFAULT_NAME,
      IDS_FLAGS_PASSIVE_EVENT_LISTENER_DEFAULT_DESCRIPTION, kOsAll,
      MULTI_VALUE_TYPE(kPassiveListenersChoices)},
     {"enable-loading-ipc-optimization-for-small-resources",
@@ skipping 201 matching lines @@
 const base::HistogramBase::Sample kBadSwitchFormatHistogramId = 0;
 
 const FeatureEntry* GetFeatureEntries(size_t* count) {
   *count = arraysize(kFeatureEntries);
   return kFeatureEntries;
 }
 
 }  // namespace testing
 
 }  // namespace about_flags