Add DesktopShapeTracker with implementation for Windows

remoting/host/desktop_shape_tracker_unittest.cc

Index: remoting/host/desktop_shape_tracker_unittest.cc
diff --git a/remoting/host/desktop_shape_tracker_unittest.cc b/remoting/host/desktop_shape_tracker_unittest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..3ea9e98d17f4e113e94b76f714fae88082ea936f
--- /dev/null
+++ b/remoting/host/desktop_shape_tracker_unittest.cc
@@ -0,0 +1,32 @@
+// Copyright (c) 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.
+
+// DesktopShapeTracker tests assume that there is at least one top-level
+// window on-screen.  Currently we assume the presence of the Explorer
+// task bar window.
+
+#include "remoting/host/desktop_shape_tracker.h"
+
+#include "base/memory/scoped_ptr.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "third_party/webrtc/modules/desktop_capture/desktop_capture_options.h"
+#include "third_party/webrtc/modules/desktop_capture/desktop_region.h"
+
+namespace remoting {
+
+// Verify that the desktop shape tracker returns a non-empty region.
+TEST(DesktopShapeTrackerTest, Basic) {
+  scoped_ptr<DesktopShapeTracker> shape_tracker = DesktopShapeTracker::Create(
+      webrtc::DesktopCaptureOptions::CreateDefault());
+
+  // Shape tracker is not supported on all platforms yet.
+#if defined(OS_WIN)
+  shape_tracker->RefreshDesktopShape();
+  EXPECT_FALSE(shape_tracker->desktop_shape().is_empty());
+#else
+  EXPECT_FALSE(shape_tracker);
+#endif
+}
+
+}  // namespace remoting