Revert of Enable NV12 VideoFrames on Mac.

content/renderer/media/renderer_gpu_video_accelerator_factories.cc

 // Copyright 2013 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/renderer/media/renderer_gpu_video_accelerator_factories.h"
 
 #include <GLES2/gl2.h>
 #include <GLES2/gl2ext.h>
 
 #include "base/bind.h"
@@ skipping 207 matching lines @@
   return image_texture_targets_[static_cast<int>(format)];
 }
 
 media::VideoPixelFormat
 RendererGpuVideoAcceleratorFactories::VideoFrameOutputFormat() {
   DCHECK(task_runner_->BelongsToCurrentThread());
   if (CheckContextLost())
     return media::PIXEL_FORMAT_UNKNOWN;
   cc::ContextProvider::ScopedContextLock lock(context_provider_);
   auto capabilities = context_provider_->ContextCapabilities();
-  if (capabilities.gpu.image_ycbcr_420v)
-    return media::PIXEL_FORMAT_NV12;
   if (capabilities.gpu.image_ycbcr_422)
     return media::PIXEL_FORMAT_UYVY;
   if (capabilities.gpu.texture_rg)
     return media::PIXEL_FORMAT_I420;
   return media::PIXEL_FORMAT_UNKNOWN;
 }
 
 namespace {
 class ScopedGLContextLockImpl
     : public media::GpuVideoAcceleratorFactories::ScopedGLContextLock {
@@ skipping 49 matching lines @@
   context_provider_refptr_ = nullptr;
 }
 
 scoped_refptr<ContextProviderCommandBuffer>
 RendererGpuVideoAcceleratorFactories::ContextProviderMainThread() {
   DCHECK(main_thread_task_runner_->BelongsToCurrentThread());
   return context_provider_refptr_;
 }
 
 }  // namespace content