mac: Remove IsOSSnowLeopard().

chrome/browser/ui/cocoa/browser_window_controller_private.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/browser_window_controller_private.h"
 
 #include <cmath>
 
 #import "base/auto_reset.h"
 #include "base/command_line.h"
@@ skipping 903 matching lines @@
 
 - (void)exitAppKitFullscreen {
   DCHECK(base::mac::IsOSLionOrLater());
   if (FramedBrowserWindow* framedBrowserWindow =
           base::mac::ObjCCast<FramedBrowserWindow>([self window])) {
     [framedBrowserWindow toggleSystemFullScreen];
   }
 }
 
 - (NSRect)fullscreenButtonFrame {
-  // NSWindowFullScreenButton is 10.7+ and results in log spam on 10.6 if used.
-  if (base::mac::IsOSSnowLeopard())
-    return NSZeroRect;
-
   NSButton* fullscreenButton =
       [[self window] standardWindowButton:NSWindowFullScreenButton];
   if (!fullscreenButton)
     return NSZeroRect;
 
   NSRect buttonFrame = [fullscreenButton frame];
 
   // When called from -windowWillExitFullScreen:, the button's frame may not
   // be updated yet to match the new window size.
   // We need to return where the button should be positioned.
@@ skipping 303 matching lines @@
   return nil;
 }
 
 - (BOOL)isFullscreenForTabContent {
   return browser_->exclusive_access_manager()
                  ->fullscreen_controller()
                  ->IsWindowFullscreenForTabOrPending();
 }
 
 @end  // @implementation BrowserWindowController(Private)