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

media/capture/video/video_capture_buffer_tracker_factory_impl.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/browser/renderer_host/media/video_capture_buffer_tracker_factory_impl.h"
+#include "media/capture/video/video_capture_buffer_tracker_factory_impl.h"
 
 #include "base/memory/ptr_util.h"
 
-#include "content/browser/renderer_host/media/shared_memory_buffer_tracker.h"
+#include "media/capture/video/shared_memory_buffer_tracker.h"
 
-namespace content {
+namespace media {
 
-std::unique_ptr<media::VideoCaptureBufferTracker>
-VideoCaptureBufferTrackerFactoryImpl::CreateTracker(
-    media::VideoPixelStorage storage) {
-  DCHECK_EQ(media::PIXEL_STORAGE_CPU, storage);
+std::unique_ptr<VideoCaptureBufferTracker>
+VideoCaptureBufferTrackerFactoryImpl::CreateTracker(VideoPixelStorage storage) {
+  DCHECK_EQ(PIXEL_STORAGE_CPU, storage);
   return base::MakeUnique<SharedMemoryBufferTracker>();
 }
 
-}  // namespace content
+}  // namespace media