Gets mustash frames looking like that of ash

mash/wm/frame/frame_border_hit_test_controller.h

Index: mash/wm/frame/frame_border_hit_test_controller.h
diff --git a/mash/wm/frame/frame_border_hit_test_controller.h b/mash/wm/frame/frame_border_hit_test_controller.h
new file mode 100644
index 0000000000000000000000000000000000000000..bcfbb77d5917ea9445d639fb04cdd03b33fd1d1b
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+++ b/mash/wm/frame/frame_border_hit_test_controller.h
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+// Copyright 2015 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.
+
+#ifndef MASH_WM_FRAME_FRAME_BORDER_HITTEST_CONTROLLER_H_
+#define MASH_WM_FRAME_FRAME_BORDER_HITTEST_CONTROLLER_H_
+
+#include "base/macros.h"
+
+namespace gfx {
+class Point;
+}
+
+namespace views {
+class NonClientFrameView;
+class Widget;
+}
+
+namespace mash {
+namespace wm {
+class FrameCaptionButtonContainerView;
+
+// Class which manages the hittest override bounds for |frame|.
+class FrameBorderHitTestController {
+ public:
+  // Does the non client hit test on behalf of |view|. |point_in_widget| must be
+  // in the coordinates of |view|'s widget.
+  static int NonClientHitTest(
+      views::NonClientFrameView* view,
+      FrameCaptionButtonContainerView* caption_button_container,
+      const gfx::Point& point_in_widget);
+
+ private:
+  DISALLOW_IMPLICIT_CONSTRUCTORS(FrameBorderHitTestController);
+};
+
+}  // namespace wm
+}  // namespace mash
+
+#endif  // MASH_WM_FRAME_FRAME_BORDER_HITTEST_CONTROLLER_H_