Avoid GpuPreferences exposed in content public gpu interface

content/common/gpu/media/gpu_video_decode_accelerator.h

 // 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.
 
 #ifndef CONTENT_COMMON_GPU_MEDIA_GPU_VIDEO_DECODE_ACCELERATOR_H_
 #define CONTENT_COMMON_GPU_MEDIA_GPU_VIDEO_DECODE_ACCELERATOR_H_
 
 #include <stdint.h>
 
 #include <map>
@@ skipping 29 matching lines @@
   // |stub->decoder()| will be made current around any operation that touches
   // the underlying VDA so that it can make GL calls safely.
   GpuVideoDecodeAccelerator(
       int32_t host_route_id,
       GpuCommandBufferStub* stub,
       const scoped_refptr<base::SingleThreadTaskRunner>& io_task_runner);
 
   // Static query for the capabilities, which includes the supported profiles.
   // This query calls the appropriate platform-specific version.  The returned
   // capabilities will not contain duplicate supported profile entries.
-  static gpu::VideoDecodeAcceleratorCapabilities GetCapabilities(
-      const gpu::GpuPreferences& gpu_preferences);
+  static gpu::VideoDecodeAcceleratorCapabilities GetCapabilities();
 
   // IPC::Listener implementation.
   bool OnMessageReceived(const IPC::Message& message) override;
 
   // media::VideoDecodeAccelerator::Client implementation.
   void NotifyCdmAttached(bool success) override;
   void ProvidePictureBuffers(uint32_t requested_num_of_buffers,
                              uint32_t textures_per_buffer,
                              const gfx::Size& dimensions,
                              uint32_t texture_target) override;
@@ skipping 95 matching lines @@
 
   // A map from picture buffer ID to TextureRef that have not been cleared.
   std::map<int32_t, scoped_refptr<gpu::gles2::TextureRef>> uncleared_textures_;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(GpuVideoDecodeAccelerator);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_COMMON_GPU_MEDIA_GPU_VIDEO_DECODE_ACCELERATOR_H_