Extract VideoCaptureDeviceFactory out of VideoCaptureDevice and use for File and FakeVCD.

media/video/capture/video_capture_device_factory.cc

+// Copyright 2014 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/capture/video_capture_device_factory.h"
+
+namespace media {
+
+VideoCaptureDeviceFactory::VideoCaptureDeviceFactory() {
+  thread_checker_.DetachFromThread();
+};
+
+scoped_ptr<VideoCaptureDevice> VideoCaptureDeviceFactory::Create(
+    const VideoCaptureDevice::Name& device_name) {
+  DCHECK(thread_checker_.CalledOnValidThread());
+  return scoped_ptr<VideoCaptureDevice>(
+      VideoCaptureDevice::Create(device_name));
+}
+
+void VideoCaptureDeviceFactory::GetDeviceNames(
+    VideoCaptureDevice::Names* device_names) {
+  DCHECK(thread_checker_.CalledOnValidThread());
+  VideoCaptureDevice::GetDeviceNames(device_names);
+}
+
+void VideoCaptureDeviceFactory::GetDeviceSupportedFormats(
+    const VideoCaptureDevice::Name& device,
+    VideoCaptureFormats* supported_formats) {
+  DCHECK(thread_checker_.CalledOnValidThread());
+  VideoCaptureDevice::GetDeviceSupportedFormats(device, supported_formats);
+}
+
+}  // namespace media