Allow to use {FFmpeg/Vpx}VideoDecoder from a UtilityProcess

media/video/default_video_frame_provider.cc

+// Copyright 2017 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 "media/video/default_video_frame_provider.h"
+
+namespace media {
+
+DefaultVideoFrameProvider::DefaultVideoFrameProvider() {}
+
+DefaultVideoFrameProvider::~DefaultVideoFrameProvider() {}
+
+scoped_refptr<VideoFrame> DefaultVideoFrameProvider::CreateZeroInitializedFrame(
+    VideoPixelFormat format,
+    const gfx::Size& coded_size,
+    const gfx::Rect& visible_rect,
+    const gfx::Size& natural_size,
+    base::TimeDelta timestamp) {
+  return VideoFrame::CreateZeroInitializedFrame(
+      format, coded_size, visible_rect, natural_size, timestamp);
+}
+
+scoped_refptr<VideoFrame> DefaultVideoFrameProvider::WrapVideoFrame(
+    const scoped_refptr<VideoFrame>& frame) {
+  return VideoFrame::WrapVideoFrame(
+      frame, frame->format(), frame->visible_rect(), frame->natural_size());
+}
+
+}  // namespace media