Add DesktopShapeTracker with implementation for Windows

remoting/host/desktop_shape_tracker_mac.cc

Index: remoting/host/desktop_shape_tracker_mac.cc
diff --git a/remoting/host/desktop_shape_tracker_mac.cc b/remoting/host/desktop_shape_tracker_mac.cc
new file mode 100644
index 0000000000000000000000000000000000000000..6b00a9bb44a550307cc37b7f81a05610fee2f210
--- /dev/null
+++ b/remoting/host/desktop_shape_tracker_mac.cc
@@ -0,0 +1,17 @@
+// 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 "remoting/host/desktop_shape_tracker.h"
+
+#include "base/memory/scoped_ptr.h"
+#include "third_party/webrtc/modules/desktop_capture/desktop_capture_options.h"
+
+namespace remoting {
+
+scoped_ptr<DesktopShapeTracker> DesktopShapeTracker::Create(
+    webrtc::DesktopCaptureOptions options) {
+  return scoped_ptr<DesktopShapeTracker>();
+}
+
+}  // namespace remoting