Mac: Fix renderer idle cpu usage regression.

chrome/common/render_messages_internal.h

 // Copyright (c) 2010 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.
 
 // This header is meant to be included in multiple passes, hence no traditional
 // header guard.
 // See ipc_message_macros.h for explanation of the macros and passes.
 
 #include <map>
 #include <string>
@@ skipping 745 matching lines @@
                       SkBitmap /* background */)
 
   // Reply to ViewHostMsg_RequestMove, ViewHostMsg_ShowView, and
   // ViewHostMsg_ShowWidget to inform the renderer that the browser has
   // processed the move.  The browser may have ignored the move, but it finished
   // processing.  This is used because the renderer keeps a temporary cache of
   // the widget position while these asynchronous operations are in progress.
   IPC_MESSAGE_ROUTED0(ViewMsg_Move_ACK)
 
   // Used to instruct the RenderView to send back updates to the preferred size.
-  IPC_MESSAGE_ROUTED0(ViewMsg_EnablePreferredSizeChangedMode)
+  IPC_MESSAGE_ROUTED1(ViewMsg_EnablePreferredSizeChangedMode, int /*flags*/)
 
   // Used to tell the renderer not to add scrollbars with height and
   // width below a threshold.
   IPC_MESSAGE_ROUTED1(ViewMsg_DisableScrollbarsForSmallWindows,
                       gfx::Size /* disable_scrollbar_size_limit */)
 
   // Used to inform the renderer that the browser has displayed its
   // requested notification.
   IPC_MESSAGE_ROUTED1(ViewMsg_PostDisplayToNotificationObject,
                       int /* notification_id */)
@@ skipping 1599 matching lines @@
   IPC_MESSAGE_CONTROL2(ViewHostMsg_Geolocation_Resume,
                        int /* render_view_id */,
                        int /* bridge_id */)
 
   // Send the tree of accessibility data to the browser, where it's cached
   // in order to respond to OS accessibility queries immediately.
   IPC_MESSAGE_ROUTED1(ViewHostMsg_AccessibilityTree,
                       webkit_glue::WebAccessibility)
 
 IPC_END_MESSAGES(ViewHost)