[PointerLock] Move "silent mouse lock" logic from renderer to RWHI

content/renderer/render_widget_mouse_lock_dispatcher.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_RENDERER_RENDER_WIDGET_MOUSE_LOCK_DISPATCHER_H_
 #define CONTENT_RENDERER_RENDER_WIDGET_MOUSE_LOCK_DISPATCHER_H_
 
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "content/renderer/mouse_lock_dispatcher.h"
 
 namespace IPC {
 class Message;
 }
 
 namespace content {
 
 class RenderWidget;
 
 // RenderWidgetMouseLockDispatcher is owned by RenderWidget.
 class RenderWidgetMouseLockDispatcher : public MouseLockDispatcher {
  public:
   explicit RenderWidgetMouseLockDispatcher(RenderWidget* render_widget);
   ~RenderWidgetMouseLockDispatcher() override;
 
   bool OnMessageReceived(const IPC::Message& message);
 
  private:
   // MouseLockDispatcher implementation.
-  void SendLockMouseRequest(bool unlocked_by_target) override;
+  void SendLockMouseRequest() override;
   void SendUnlockMouseRequest() override;
 
   void OnLockMouseACK(bool succeeded);
 
   RenderWidget* render_widget_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderWidgetMouseLockDispatcher);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_RENDER_WIDGET_MOUSE_LOCK_DISPATCHER_H_