mac: Remove IsOSSnowLeopard().

ui/base/test/scoped_fake_nswindow_fullscreen_unittest.mm

 // Copyright 2015 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 "ui/base/test/scoped_fake_nswindow_fullscreen.h"
 
 #import "base/mac/mac_util.h"
 #import "base/mac/scoped_nsobject.h"
 #import "base/mac/sdk_forward_declarations.h"
 #include "base/message_loop/message_loop.h"
@@ skipping 23 matching lines @@
   return targetSize_;
 }
 
 @end
 
 namespace ui {
 namespace test {
 
 // Test the order of notifications sent when faking fullscreen transitions.
 TEST(ScopedFakeNSWindowFullscreenTest, TestOrdering) {
-  if (base::mac::IsOSSnowLeopard())
-    return;
-
   base::MessageLoopForUI message_loop;
 
   NSUInteger style_mask = NSTexturedBackgroundWindowMask | NSTitledWindowMask |
                           NSClosableWindowMask | NSMiniaturizableWindowMask |
                           NSResizableWindowMask;
   base::scoped_nsobject<NSWindow> window(
       [[NSWindow alloc] initWithContentRect:NSMakeRect(50, 60, 130, 170)
                                   styleMask:style_mask
                                     backing:NSBackingStoreBuffered
                                       defer:NO]);
@@ skipping 74 matching lines @@
   [window toggleFullScreen:nil];
   [window setFrame:new_frame display:YES animate:NO];
   EXPECT_TRUE([did_exit waitForCount:2]);
   EXPECT_NSEQ(frame_outside_fullscreen, [window frame]);
 
   [window close];
 }
 
 }  // namespace test
 }  // namespace ui