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

chrome/browser/ui/fullscreen_controller.cc

 // 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.
 
 #include "chrome/browser/ui/fullscreen_controller.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/message_loop.h"
 #include "chrome/browser/content_settings/host_content_settings_map.h"
@@ skipping 41 matching lines @@
   if (!wrapper || (wrapper != fullscreened_tab_))
     return false;
   DCHECK(tab == browser_->GetSelectedWebContents());
   return true;
 }
 
 bool FullscreenController::IsMouseLockedOrPending() const {
   return mouse_lock_state_ != MOUSELOCK_NOT_REQUESTED;
 }
 
-void FullscreenController::RequestToLockMouse(WebContents* tab) {
+void FullscreenController::RequestToLockMouse(WebContents* tab,
+                                              bool  /* user_gesture */) {

[yzshen1, 2012/04/25 23:24:36]

One space after bool, please.

+  // TODO(scheib) user_gesture required for Mouse Lock in Windowed Mode.
+  // See http://crbug.com/107013, which will land in multiple patches.
+
   // Mouse Lock is only permitted when browser is in tab fullscreen.
   if (!IsFullscreenForTabOrPending(tab)) {
     tab->GotResponseToLockMouseRequest(false);
     return;
   }
 
   if (mouse_lock_state_ == MOUSELOCK_ACCEPTED) {
     tab->GotResponseToLockMouseRequest(true);
     return;
   }
@@ skipping 330 matching lines @@
   // WindowFullscreenStateChanged(). We don't do this immediately as
   // BrowserWindow::EnterFullscreen() asks for bookmark_bar_state_, so we let
   // the BrowserWindow invoke WindowFullscreenStateChanged when appropriate.
 
   // TODO: convert mac to invoke WindowFullscreenStateChanged once it updates
   // the necessary state of the frame.
 #if defined(OS_MACOSX)
   WindowFullscreenStateChanged();
 #endif
 }