mac: Remove IsOSSnowLeopard().

chrome/browser/ui/cocoa/presentation_mode_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/presentation_mode_controller.h"
 
 #include <algorithm>
 
 #include "base/command_line.h"
 #import "base/mac/mac_util.h"
@@ skipping 242 matching lines @@
   enteringPresentationMode_ = YES;
   inPresentationMode_ = YES;
   contentView_ = contentView;
   [self changeToolbarFraction:(showDropdown ? 1 : 0)];
   [self updateMenuBarAndDockVisibility];
 
   // Register for notifications.  Self is removed as an observer in |-cleanup|.
   NSNotificationCenter* nc = [NSNotificationCenter defaultCenter];
   NSWindow* window = [browserController_ window];
 
-  // Disable these notifications on Lion as they cause crashes.
-  // TODO(rohitrao): Figure out what happens if a fullscreen window changes
-  // monitors on Lion.
-  if (base::mac::IsOSSnowLeopard()) {
-    [nc addObserver:self
-           selector:@selector(windowDidChangeScreen:)
-               name:NSWindowDidChangeScreenNotification
-             object:window];
-
-    [nc addObserver:self
-           selector:@selector(windowDidMove:)
-               name:NSWindowDidMoveNotification
-             object:window];
-  }
-
   [nc addObserver:self
          selector:@selector(windowDidBecomeMain:)
              name:NSWindowDidBecomeMainNotification
            object:window];
 
   [nc addObserver:self
          selector:@selector(windowDidResignMain:)
              name:NSWindowDidResignMainNotification
            object:window];
 
@@ skipping 485 matching lines @@
   [self updateMenuBarAndDockVisibility];
 
   // TODO(rohitrao): Remove the Exit Fullscreen button.  http://crbug.com/35956
 }
 
 - (BOOL)shouldShowMenubarInImmersiveFullscreen {
   return [self doesScreenHaveMenuBar] && toolbarFraction_ > 0.99;
 }
 
 @end