Avoid GpuPreferences exposed in content public gpu interface

content/public/gpu/gpu_video_decode_accelerator_factory.cc

 // Copyright 2016 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/common/gpu/media/gpu_video_decode_accelerator_factory_impl.h"
 #include "content/public/gpu/gpu_video_decode_accelerator_factory.h"
 
 namespace content {
 
 GpuVideoDecodeAcceleratorFactory::~GpuVideoDecodeAcceleratorFactory() {}
@@ skipping 26 matching lines @@
           get_gles2_decoder_cb);
   if (!gvdafactory_impl)
     return nullptr;
 
   return make_scoped_ptr(
       new GpuVideoDecodeAcceleratorFactory(std::move(gvdafactory_impl)));
 }
 
 // static
 gpu::VideoDecodeAcceleratorCapabilities
-GpuVideoDecodeAcceleratorFactory::GetDecoderCapabilities(
-    const gpu::GpuPreferences& gpu_preferences) {
-  return GpuVideoDecodeAcceleratorFactoryImpl::GetDecoderCapabilities(
-      gpu_preferences);
+GpuVideoDecodeAcceleratorFactory::GetDecoderCapabilities() {
+  return GpuVideoDecodeAcceleratorFactoryImpl::GetDecoderCapabilities();
 }
 
 scoped_ptr<media::VideoDecodeAccelerator>
 GpuVideoDecodeAcceleratorFactory::CreateVDA(
     media::VideoDecodeAccelerator::Client* client,
-    const media::VideoDecodeAccelerator::Config& config,
-    const gpu::GpuPreferences& gpu_preferences) {
+    const media::VideoDecodeAccelerator::Config& config) {
   if (!gvdafactory_impl_)
     return nullptr;
 
-  return gvdafactory_impl_->CreateVDA(client, config, gpu_preferences);
+  return gvdafactory_impl_->CreateVDA(client, config);
 }
 
 GpuVideoDecodeAcceleratorFactory::GpuVideoDecodeAcceleratorFactory(
     scoped_ptr<GpuVideoDecodeAcceleratorFactoryImpl> gvdafactory_impl)
     : gvdafactory_impl_(std::move(gvdafactory_impl)) {}
 
 }  // namespace content