Avoid GpuPreferences exposed in content public gpu interface

content/common/gpu/media/gpu_video_decode_accelerator.h

Index: content/common/gpu/media/gpu_video_decode_accelerator.h
diff --git a/content/common/gpu/media/gpu_video_decode_accelerator.h b/content/common/gpu/media/gpu_video_decode_accelerator.h
index 3bbef5a9f1472724f12d222dbe86e39dda66cd70..5b73e4486d0e70c06a2b890a42b9f89c52455930 100644
--- a/content/common/gpu/media/gpu_video_decode_accelerator.h
+++ b/content/common/gpu/media/gpu_video_decode_accelerator.h
@@ -47,8 +47,7 @@ class GpuVideoDecodeAccelerator
   // 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;