Wires up immersive mode for chrome and mash

ash/mus/frame/custom_frame_view_mus.h

Index: ash/mus/frame/custom_frame_view_mus.h
diff --git a/ash/mus/frame/custom_frame_view_mus.h b/ash/mus/frame/custom_frame_view_mus.h
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+// Copyright 2016 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 ASH_MUS_FRAME_CUSTOM_FRAME_VIEW_MUS_H_
+#define ASH_MUS_FRAME_CUSTOM_FRAME_VIEW_MUS_H_
+
+#include "ash/common/frame/custom_frame_view_ash.h"
+#include "ui/compositor/paint_cache.h"
+
+namespace ash {
+namespace mus {
+
+class CustomFrameViewMus : public CustomFrameViewAsh {
+ public:
+  CustomFrameViewMus(views::Widget* widget,
+                     ImmersiveFullscreenControllerDelegate* immersive_delegate,
+                     bool enable_immersive);
+  ~CustomFrameViewMus() override;
+
+  // CustomFrameViewAsh:
+  void OnPaint(gfx::Canvas* canvas) override;
+  void PaintChildren(const ui::PaintContext& context) override;
+
+ private:
+  ui::PaintCache paint_cache_;
+
+  DISALLOW_COPY_AND_ASSIGN(CustomFrameViewMus);
+};
+
+}  // namespace mus
+}  // namespace ash
+
+#endif  // ASH_MUS_FRAME_CUSTOM_FRAME_VIEW_MUS_H_