Add --enable-webkit-media-source for Android instead of hardcoding it to be disabled.

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 <algorithm>
 #include <iterator>
 #include <map>
 #include <set>
@@ skipping 677 matching lines @@
     SINGLE_VALUE_TYPE(switches::kEnableAutologin)
   },
   {
     "enable-async-dns",
     IDS_FLAGS_ENABLE_ASYNC_DNS_NAME,
     IDS_FLAGS_ENABLE_ASYNC_DNS_DESCRIPTION,
     kOsWin | kOsMac | kOsLinux | kOsCrOS,
     ENABLE_DISABLE_VALUE_TYPE(switches::kEnableAsyncDns,
                               switches::kDisableAsyncDns)
   },
+#if defined(ANDROID) && !defined(GOOGLE_TV)
+  {
+    "enable-media-source",
+    IDS_FLAGS_ENABLE_WEBKIT_MEDIA_SOURCE_NAME,
+    IDS_FLAGS_ENABLE_WEBKIT_MEDIA_SOURCE_DESCRIPTION,
+    kOsAll,
+    SINGLE_VALUE_TYPE(switches::kEnableWebKitMediaSource)
+  },
+#else
   {
     "disable-media-source",
     IDS_FLAGS_DISABLE_WEBKIT_MEDIA_SOURCE_NAME,
     IDS_FLAGS_DISABLE_WEBKIT_MEDIA_SOURCE_DESCRIPTION,
     kOsAll,
     SINGLE_VALUE_TYPE(switches::kDisableWebKitMediaSource)
   },
+#endif
   {
     "disable-encrypted-media",
     IDS_FLAGS_DISABLE_ENCRYPTED_MEDIA_NAME,
     IDS_FLAGS_DISABLE_ENCRYPTED_MEDIA_DESCRIPTION,
     kOsDesktop,
     SINGLE_VALUE_TYPE(switches::kDisableEncryptedMedia)
   },
   {
     "enable-opus-playback",
     IDS_FLAGS_ENABLE_OPUS_PLAYBACK_NAME,
@@ skipping 1254 matching lines @@
 }
 
 const Experiment* GetExperiments(size_t* count) {
   *count = num_experiments;
   return experiments;
 }
 
 }  // namespace testing
 
 }  // namespace about_flags