Linux: move X operations from the IO to UI2 thread.

chrome/browser/renderer_host/resource_message_filter_mac.mm

 // Copyright (c) 2009 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/renderer_host/resource_message_filter.h"
+#include "chrome/common/render_messages.h"
 
 #import <Cocoa/Cocoa.h>
 
 namespace {
 
 // Adjusts an NSRect in screen coordinates to have an origin in the upper left,
 // and stuffs it into a gfx::Rect. This is likely incorrect for a multiple-
 // monitor setup.
 gfx::Rect NSRectToRect(const NSRect rect, NSScreen* screen) {
   gfx::Rect new_rect(NSRectToCGRect(rect));
   new_rect.set_y([screen frame].size.height - new_rect.y() - new_rect.height());
   return new_rect;
 }
 
 }
 
 // We get null window_ids passed into the two functions below; please see
 // http://crbug.com/9060 for more details.
 
 void ResourceMessageFilter::OnGetWindowRect(gfx::NativeViewId window_id,
-                                            gfx::Rect* rect) {
+                                            IPC::Message* reply_msg) {
   NSView* view = gfx::NativeViewFromId(window_id);
-  if (!view) {
-    *rect = gfx::Rect();
-    return;
+  gfx::Rect rect;
+
+  if (view) {
+    NSRect bounds = [view bounds];
+    bounds = [view convertRect:bounds toView:nil];
+    bounds.origin = [[view window] convertBaseToScreen:bounds.origin];
+    rect = NSRectToRect(bounds, [[view window] screen]);
   }
 
-  NSRect bounds = [view bounds];
-  bounds = [view convertRect:bounds toView:nil];
-  bounds.origin = [[view window] convertBaseToScreen:bounds.origin];
-  *rect = NSRectToRect(bounds, [[view window] screen]);
+  ViewHostMsg_GetWindowRect::WriteReplyParams(reply_msg, rect);
+  Send(reply_msg);
 }
 
 void ResourceMessageFilter::OnGetRootWindowRect(gfx::NativeViewId window_id,
-                                                gfx::Rect* rect) {
+                                                IPC::Message* reply_msg) {
   NSView* view = gfx::NativeViewFromId(window_id);
-  if (!view) {
-    *rect = gfx::Rect();
-    return;
+  gfx::Rect rect;
+  if (view) {
+    NSWindow* window = [view window];
+    NSRect bounds = [window frame];
+    gfx::Rect rect = NSRectToRect(bounds, [window screen]);
   }
 
-  NSWindow* window = [view window];
-  NSRect bounds = [window frame];
-  *rect = NSRectToRect(bounds, [window screen]);
+  ViewHostMsg_GetRootWindowRect::WriteReplyParams(reply_msg, rect);
+  Send(reply_msg);
 }