User Gesture plumbed from Renderer to Browser's FullscreenController::RequestToLockMouse.

chrome/browser/ui/fullscreen_controller.h

 // 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.
 
 #ifndef CHROME_BROWSER_UI_FULLSCREEN_CONTROLLER_H_
 #define CHROME_BROWSER_UI_FULLSCREEN_CONTROLLER_H_
 #pragma once
 
 #include "base/basictypes.h"
 #include "base/memory/ref_counted.h"
@@ skipping 37 matching lines @@
   // The window may still be transitioning, and window_->IsFullscreen()
   // may still return false.
   bool IsFullscreenForTabOrPending() const;
   bool IsFullscreenForTabOrPending(const content::WebContents* tab) const;
 
   // Returns true if the mouse has been locked or a lock request is pending
   // user confirmation.
   bool IsMouseLockedOrPending() const;
 
   // Requests.
-  void RequestToLockMouse(content::WebContents* tab);
+  void RequestToLockMouse(content::WebContents* tab, bool user_gesture);
   void ToggleFullscreenModeForTab(content::WebContents* tab,
                                   bool enter_fullscreen);
 #if defined(OS_MACOSX)
   void TogglePresentationMode();
 #endif
   void ToggleFullscreenMode();
   // Extension API implementation uses this method to toggle fullscreen mode.
   // The extension's name is displayed in the full screen bubble UI to attribute
   // the cause of the full screen state change.
   void ToggleFullscreenModeWithExtension(const GURL& extension_url);
@@ skipping 56 matching lines @@
   // True if tab fullscreen has been allowed, either by settings or by user
   // clicking the allow button on the fullscreen infobar.
   bool tab_fullscreen_accepted_;
 
   MouseLockState mouse_lock_state_;
 
   DISALLOW_COPY_AND_ASSIGN(FullscreenController);
 };
 
 #endif  // CHROME_BROWSER_UI_FULLSCREEN_CONTROLLER_H_