Use webrtc::DesktopCapturer for screen capturer implementation.

media/video/capture/screen/mouse_cursor_shape.cc

Index: media/video/capture/screen/mouse_cursor_shape.cc
diff --git a/media/video/capture/screen/mouse_cursor_shape.cc b/media/video/capture/screen/mouse_cursor_shape.cc
deleted file mode 100644
index f57f7fb21991fa8e80713d6cbcf6c9275468eecf..0000000000000000000000000000000000000000
--- a/media/video/capture/screen/mouse_cursor_shape.cc
+++ /dev/null
@@ -1,17 +0,0 @@
-// Copyright (c) 2012 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/screen/mouse_cursor_shape.h"
-
-namespace media {
-
-MouseCursorShape::MouseCursorShape()
-  : size(SkISize::Make(0, 0)),
-    hotspot(SkIPoint::Make(0, 0)) {
-}
-
-MouseCursorShape::~MouseCursorShape() {
-}
-
-}  // namespace media