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

content/browser/renderer_host/render_view_host_impl.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 CONTENT_BROWSER_RENDERER_HOST_RENDER_VIEW_HOST_IMPL_H_
 #define CONTENT_BROWSER_RENDERER_HOST_RENDER_VIEW_HOST_IMPL_H_
 #pragma once
 
 #include <string>
 #include <vector>
@@ skipping 401 matching lines @@
 
   // RenderWidgetHost protected overrides.
   virtual bool PreHandleKeyboardEvent(const NativeWebKeyboardEvent& event,
                                       bool* is_keyboard_shortcut) OVERRIDE;
   virtual void UnhandledKeyboardEvent(
       const NativeWebKeyboardEvent& event) OVERRIDE;
   virtual void OnUserGesture() OVERRIDE;
   virtual void NotifyRendererUnresponsive() OVERRIDE;
   virtual void NotifyRendererResponsive() OVERRIDE;
   virtual void OnRenderAutoResized(const gfx::Size& size) OVERRIDE;
-  virtual void RequestToLockMouse() OVERRIDE;
+  virtual void RequestToLockMouse(bool user_gesture) OVERRIDE;
   virtual bool IsFullscreen() const OVERRIDE;
   virtual void OnMsgFocus() OVERRIDE;
   virtual void OnMsgBlur() OVERRIDE;
 
   // IPC message handlers.
   void OnMsgShowView(int route_id,
                      WindowOpenDisposition disposition,
                      const gfx::Rect& initial_pos,
                      bool user_gesture);
   void OnMsgShowWidget(int route_id, const gfx::Rect& initial_pos);
@@ skipping 194 matching lines @@
   DISALLOW_COPY_AND_ASSIGN(RenderViewHostImpl);
 };
 
 #if defined(COMPILER_MSVC)
 #pragma warning(pop)
 #endif
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_RENDER_VIEW_HOST_IMPL_H_