Fix code style and gyp files in cast to build cast_unittest

media/cast/rtcp/mock_rtcp_receiver_feedback.cc

Index: media/cast/rtcp/mock_rtcp_receiver_feedback.cc
diff --git a/media/cast/rtcp/mock_rtcp_receiver_feedback.cc b/media/cast/rtcp/mock_rtcp_receiver_feedback.cc
new file mode 100644
index 0000000000000000000000000000000000000000..daaa1ad088337eebf30886e5bf03999a06f38358
--- /dev/null
+++ b/media/cast/rtcp/mock_rtcp_receiver_feedback.cc
@@ -0,0 +1,23 @@
+// 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/cast/rtcp/mock_rtcp_receiver_feedback.h"
+
+namespace media {
+namespace cast {
+
+MockRtcpReceiverFeedback::MockRtcpReceiverFeedback() {
+}
+
+MockRtcpReceiverFeedback::~MockRtcpReceiverFeedback() {
+}
+
+MockRtcpRttFeedback::MockRtcpRttFeedback() {
+}
+
+MockRtcpRttFeedback::~MockRtcpRttFeedback() {
+}
+
+}  // namespace cast
+}  // namespace media