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

content/common/view_messages.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.
 
 // IPC messages for page rendering.
 // Multiply-included message file, hence no include guard.
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 803 matching lines @@
 
 // Notifies the browser of an event occurring in the media pipeline.
 IPC_MESSAGE_CONTROL1(ViewHostMsg_MediaLogEvents,
                      std::vector<media::MediaLogEvent> /* events */)
 
 // Requests to lock the mouse. Will result in a ViewMsg_LockMouse_ACK message
 // being sent back.
 // |privileged| is used by Pepper Flash. If this flag is set to true, we won't
 // pop up a bubble to ask for user permission or take mouse lock content into
 // account.
-IPC_MESSAGE_ROUTED3(ViewHostMsg_LockMouse,
+IPC_MESSAGE_ROUTED2(ViewHostMsg_LockMouse,
                     bool /* user_gesture */,
-                    bool /* last_unlocked_by_target */,
                     bool /* privileged */)
 
 // Requests to unlock the mouse. A ViewMsg_MouseLockLost message will be sent
 // whenever the mouse is unlocked (which may or may not be caused by
 // ViewHostMsg_UnlockMouse).
 IPC_MESSAGE_ROUTED0(ViewHostMsg_UnlockMouse)
 
 // Notifies that multiple touch targets may have been pressed, and to show
 // the disambiguation popup.
 IPC_MESSAGE_ROUTED3(ViewHostMsg_ShowDisambiguationPopup,
@@ skipping 49 matching lines @@
                     int /* y */)
 
 #elif defined(OS_MACOSX)
 // Receives content of a web page as plain text.
 IPC_MESSAGE_ROUTED1(ViewMsg_GetRenderedTextCompleted, std::string)
 #endif
 
 // Adding a new message? Stick to the sort order above: first platform
 // independent ViewMsg, then ifdefs for platform specific ViewMsg, then platform
 // independent ViewHostMsg, then ifdefs for platform specific ViewHostMsg.