[Mac] Fullscreen layout issues

chrome/browser/ui/cocoa/tabs/tab_window_controller.mm

 // 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.
 
 #import "chrome/browser/ui/cocoa/tabs/tab_window_controller.h"
 
 #include "base/logging.h"
 #import "base/mac/sdk_forward_declarations.h"
 #import "chrome/browser/ui/cocoa/browser_window_layout.h"
 #import "chrome/browser/ui/cocoa/fast_resize_view.h"
@@ skipping 335 matching lines @@
   NOTIMPLEMENTED();
   return NO;
 }
 
 - (CGFloat)menubarOffset {
   // Subclasses should implement this.
   NOTIMPLEMENTED();
   return 0;
 }
 
+- (CGFloat)menubarHeight {
+  // The height of the menubar. We can't use |-[NSMenu menuBarHeight]| since it
+  // returns 0 when the menu bar is hidden.
+  const CGFloat kMenubarHeight = 22;
+  return kMenubarHeight;
+}
+
 - (NSView*)avatarView {
   return nil;
 }
 
 - (NSString*)activeTabTitle {
   // subclass must implement
   NOTIMPLEMENTED();
   return @"";
 }
 
@@ skipping 81 matching lines @@
 
 - (void)windowWillEnterFullScreenNotification:(NSNotification*)notification {
   [[visualEffectView_ animator] setAlphaValue:0.0];
 }
 
 - (void)windowWillExitFullScreenNotification:(NSNotification*)notification {
   [[visualEffectView_ animator] setAlphaValue:1.0];
 }
 
 @end