[Mojo Video Capture] Move SharedMem Tracker/BufferHandle/Factory from content to media

content/browser/renderer_host/media/video_capture_buffer_tracker_factory_impl.cc

Index: content/browser/renderer_host/media/video_capture_buffer_tracker_factory_impl.cc
diff --git a/content/browser/renderer_host/media/video_capture_buffer_tracker_factory_impl.cc b/content/browser/renderer_host/media/video_capture_buffer_tracker_factory_impl.cc
deleted file mode 100644
index e44f12bef8653749ff677d55199adcadc74805fa..0000000000000000000000000000000000000000
--- a/content/browser/renderer_host/media/video_capture_buffer_tracker_factory_impl.cc
+++ /dev/null
@@ -1,20 +0,0 @@
-// 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/browser/renderer_host/media/video_capture_buffer_tracker_factory_impl.h"
-
-#include "base/memory/ptr_util.h"
-
-#include "content/browser/renderer_host/media/shared_memory_buffer_tracker.h"
-
-namespace content {
-
-std::unique_ptr<media::VideoCaptureBufferTracker>
-VideoCaptureBufferTrackerFactoryImpl::CreateTracker(
-    media::VideoPixelStorage storage) {
-  DCHECK_EQ(media::PIXEL_STORAGE_CPU, storage);
-  return base::MakeUnique<SharedMemoryBufferTracker>();
-}
-
-}  // namespace content