Typo fix, since we use screens not screeens.

chrome/browser/ui/panels/panel_window_controller_cocoa.mm

 // Copyright (c) 2011 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/panels/panel_window_controller_cocoa.h"
 
 #import <Cocoa/Cocoa.h>
 
 #include "base/logging.h"
 #include "base/mac/mac_util.h"
@@ skipping 390 matching lines @@
 }
 
 - (void)flipExpansionState {
     Panel* panel = windowShim_->panel();
     Panel::ExpansionState newExpansionState =
       (panel->expansion_state() != Panel::EXPANDED) ? Panel::EXPANDED
                                                     : Panel::MINIMIZED;
     panel->SetExpansionState(newExpansionState);
 }
 
-- (int)titlebarHeightInScreeenCoordinates {
+- (int)titlebarHeightInScreenCoordinates {
   NSView* titlebar = [self titlebarView];
   return NSHeight([titlebar convertRect:[titlebar bounds] toView:nil]);
 }
 // TestingAPI interface implementation
 
 + (void)enableBoundsAnimationNotifications {
   g_reportAnimationStatus = YES;
 }
 
 @end