Typo fix, since we use screens not screeens.

chrome/browser/ui/panels/panel_browser_window_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_browser_window_cocoa.h"
 
 #include "base/logging.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/cocoa/find_bar/find_bar_bridge.h"
 #import "chrome/browser/ui/cocoa/browser_window_utils.h"
@@ skipping 94 matching lines @@
 }
 
 void PanelBrowserWindowCocoa::OnPanelExpansionStateChanged(
     Panel::ExpansionState expansion_state) {
   int height;  // New height of the Panel in screen coordinates.
   switch (expansion_state) {
     case Panel::EXPANDED:
       height = restored_height_;
       break;
     case Panel::TITLE_ONLY:
-      height = [controller_ titlebarHeightInScreeenCoordinates];
+      height = [controller_ titlebarHeightInScreenCoordinates];
       break;
     case Panel::MINIMIZED:
       height = 3;  // TODO(dimich) merge with GTK patch which defines it better.
       break;
     default:
       NOTREACHED();
       height = restored_height_;
       break;
   }
 
@@ skipping 203 matching lines @@
 
 void NativePanelTestingCocoa::SetMousePositionForMinimizeRestore(
     const gfx::Point& hover_point) {
   NOTIMPLEMENTED();
 }
 
 int NativePanelTestingCocoa::TitleOnlyHeight() const {
   NOTIMPLEMENTED();
   return -1;
 }