media: Remove VP9 flag, and enable VP9 support by default.

content/browser/renderer_host/render_process_host_impl.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.
 
 // Represents the browser side of the browser <--> renderer communication
 // channel. There will be one RenderProcessHost per renderer process.
 
 #include "content/browser/renderer_host/render_process_host_impl.h"
 
 #include <algorithm>
@@ skipping 911 matching lines @@
     switches::kEnableCompositingForTransition,
     switches::kDisableCompositingForTransition,
     switches::kDisableThreadedCompositing,
     switches::kDisableTouchAdjustment,
     switches::kDefaultTileWidth,
     switches::kDefaultTileHeight,
     switches::kMaxUntiledLayerWidth,
     switches::kMaxUntiledLayerHeight,
     switches::kEnableViewport,
     switches::kEnableOpusPlayback,
-    switches::kEnableVp9Playback,
     switches::kEnableVp8AlphaPlayback,
     switches::kEnableEac3Playback,
     switches::kForceDeviceScaleFactor,
     switches::kFullMemoryCrashReport,
 #if !defined (GOOGLE_CHROME_BUILD)
     // These are unsupported and not fully tested modes, so don't enable them
     // for official Google Chrome builds.
     switches::kInProcessPlugins,
 #endif  // GOOGLE_CHROME_BUILD
     switches::kJavaScriptFlags,
@@ skipping 861 matching lines @@
       continue;
 
     RenderViewHost* rvh =
         RenderViewHost::From(const_cast<RenderWidgetHost*>(widget));
 
     rvh->UpdateWebkitPreferences(rvh->GetWebkitPreferences());
   }
 }
 
 }  // namespace content