Fix code style and gyp files in cast to build cast_unittest

media/cast/rtp_common/mock_rtp_payload_feedback.cc

 // Copyright 2013 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/filters/gpu_video_accelerator_factories.h"
+#include "media/cast/rtp_common/mock_rtp_payload_feedback.h"
 
 namespace media {
+namespace cast {
 
-GpuVideoAcceleratorFactories::~GpuVideoAcceleratorFactories() {}
+MockRtpPayloadFeedback::MockRtpPayloadFeedback() {
+}
 
+MockRtpPayloadFeedback::~MockRtpPayloadFeedback() {
+}
+
+}  // namespace cast
 }  // namespace media