[Mac] Refactor Cocoa fullscreen code

chrome/browser/ui/cocoa/framed_browser_window.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/framed_browser_window.h"
 
 #include <stddef.h>
 
 #include "base/logging.h"
 #include "base/mac/sdk_forward_declarations.h"
@@ skipping 196 matching lines @@
   // Do not constrain the frame rect if our delegate says no.  In this case,
   // return the original (unconstrained) frame.
   id delegate = [self delegate];
   if ([delegate respondsToSelector:@selector(shouldConstrainFrameRect)] &&
       ![delegate shouldConstrainFrameRect])
     return frame;
 
   return [super constrainFrameRect:frame toScreen:screen];
 }
 
-// This method is overridden in order to send the toggle fullscreen message
-// through the cross-platform browser framework before going fullscreen.  The
-// message will eventually come back as a call to |-toggleSystemFullScreen|,
-// which in turn calls AppKit's |NSWindow -toggleFullScreen:|.
-- (void)toggleFullScreen:(id)sender {
-  id delegate = [self delegate];
-  if ([delegate respondsToSelector:@selector(handleLionToggleFullscreen)])
-    [delegate handleLionToggleFullscreen];
-}
-
-- (void)toggleSystemFullScreen {
-  if ([super respondsToSelector:@selector(toggleFullScreen:)])
-    [super toggleFullScreen:nil];
-}
-
 - (NSPoint)fullScreenButtonOriginAdjustment {
   if (!hasTabStrip_)
     return NSZeroPoint;
 
   // Vertically center the button.
   NSPoint origin = NSMakePoint(0, -6);
 
   // If there is a profile avatar icon present, shift the button over by its
   // width and some padding. The new avatar button is displayed to the right
   // of the fullscreen icon, so it doesn't need to be shifted.
@@ skipping 129 matching lines @@
   [self childWindowsDidChange];
 }
 
 - (void)childWindowsDidChange {
   id delegate = [self delegate];
   if ([delegate respondsToSelector:@selector(childWindowsDidChange)])
     [delegate childWindowsDidChange];
 }
 
 @end