Start using the controller in app's view.

chrome/browser/ui/exclusive_access/exclusive_access_context_browser.h

 // Copyright (c) 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 CHROME_BROWSER_UI_EXCLUSIVE_ACCESS_EXCLUSIVE_ACCESS_CONTEXT_BROWSER_H_
 #define CHROME_BROWSER_UI_EXCLUSIVE_ACCESS_EXCLUSIVE_ACCESS_CONTEXT_BROWSER_H_
 
 #include "chrome/browser/ui/exclusive_access/exclusive_access_bubble_type.h"
 #include "chrome/browser/ui/exclusive_access/exclusive_access_context.h"
 
 class Browser;
 class GURL;
 
 // Implements ExclusiveAccessContext interface to be used in browser context.
 class ExclusiveAccessContextBrowser : public ExclusiveAccessContext {
  public:
   explicit ExclusiveAccessContextBrowser(Browser* browser);
   ~ExclusiveAccessContextBrowser() override;
 
   // ExclusiveAccessContext
   Profile* GetProfile() override;
-  bool IsFullscreen() override;
+  bool IsFullscreen() const override;
   bool IsFullscreenWithToolbar() override;
   bool SupportsFullscreenWithToolbar() override;
   void EnterFullscreen(const GURL& url,
                        ExclusiveAccessBubbleType bubble_type,
                        bool with_toolbar) override;
   void ExitFullscreen() override;
   void UpdateExclusiveAccessExitBubbleContent(
       GURL url,
       ExclusiveAccessBubbleType bubble_type) override;
   content::WebContents* GetActiveWebContents() override;
   void UpdateFullscreenWithToolbar(bool with_toolbar) override;
 
   // These two functions are NOOP except in OS_WIN.
   void SetMetroSnapMode(bool enable) override;
   bool IsInMetroSnapMode() override;
 
   void UpdateDownloadShelf(bool unhide) override;
 
+  // TODO(sriramsr): HACK:
+  bool UseCallbackForMouseLock() override;
+  bool MouseLockCallback(bool acquired) override;
+
  private:
   Browser* const browser_;
 
   DISALLOW_COPY_AND_ASSIGN(ExclusiveAccessContextBrowser);
 };
 
 #endif  // CHROME_BROWSER_UI_EXCLUSIVE_ACCESS_EXCLUSIVE_ACCESS_CONTEXT_BROWSER_H_