Revert of Converts chrome to aura-mus

chrome/browser/ui/views/frame/immersive_context_mus.h

 // 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 CHROME_BROWSER_UI_VIEWS_FRAME_IMMERSIVE_CONTEXT_MUS_H_
 #define CHROME_BROWSER_UI_VIEWS_FRAME_IMMERSIVE_CONTEXT_MUS_H_
 
 #include "ash/shared/immersive_context.h"
 #include "base/macros.h"
 
-namespace aura {
-namespace client {
-class CaptureClient;
-}
-}
-
 class ImmersiveContextMus : public ash::ImmersiveContext {
  public:
-  explicit ImmersiveContextMus(aura::client::CaptureClient* capture_client);
+  ImmersiveContextMus();
   ~ImmersiveContextMus() override;
 
   // ash::ImmersiveContext:
   void InstallResizeHandleWindowTargeter(
       ash::ImmersiveFullscreenController* controller) override;
   void OnEnteringOrExitingImmersive(
       ash::ImmersiveFullscreenController* controller,
       bool entering) override;
   gfx::Rect GetDisplayBoundsInScreen(views::Widget* widget) override;
   void AddPointerWatcher(views::PointerWatcher* watcher,
                          views::PointerWatcherEventTypes events) override;
   void RemovePointerWatcher(views::PointerWatcher* watcher) override;
   bool DoesAnyWindowHaveCapture() override;
   bool IsMouseEventsEnabled() override;
 
  private:
-  aura::client::CaptureClient* capture_client_;
-
   DISALLOW_COPY_AND_ASSIGN(ImmersiveContextMus);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_FRAME_IMMERSIVE_CONTEXT_MUS_H_