mac: Remove IsOSLion().

ui/views/cocoa/bridged_native_widget_unittest.mm

 // Copyright 2014 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/views/cocoa/bridged_native_widget.h"
 
 #import <Cocoa/Cocoa.h>
 
 #include <memory>
 
@@ skipping 698 matching lines @@
   // BridgedNativeWidget will think it's just a delayed transition and try to go
   // back into fullscreen but get ignored by Cocoa.
   EXPECT_EQ(0, [window ignoredToggleFullScreenCount]);
   EXPECT_TRUE(bridge()->target_fullscreen_state());
   [center postNotificationName:NSWindowDidExitFullScreenNotification
                         object:window];
   EXPECT_EQ(1, [window ignoredToggleFullScreenCount]);
   EXPECT_FALSE(bridge()->target_fullscreen_state());
 
   // Cocoa follows up with a failure message sent to the NSWindowDelegate (there
-  // is no equivalent notification for failure). Called via id so that this
-  // compiles on 10.6.
+  // is no equivalent notification for failure).
   ViewsNSWindowDelegate* window_delegate =
       base::mac::ObjCCast<ViewsNSWindowDelegate>([window delegate]);
   [window_delegate windowDidFailToEnterFullScreen:window];
   EXPECT_FALSE(bridge()->target_fullscreen_state());
 
   // Now perform a successful fullscreen operation.
   [center postNotificationName:NSWindowWillEnterFullScreenNotification
                         object:window];
   EXPECT_TRUE(bridge()->target_fullscreen_state());
   [center postNotificationName:NSWindowDidEnterFullScreenNotification
@@ skipping 12 matching lines @@
   [center postNotificationName:NSWindowDidExitFullScreenNotification
                         object:window];
   EXPECT_EQ(1, [window ignoredToggleFullScreenCount]);  // No change.
   EXPECT_FALSE(bridge()->target_fullscreen_state());
 
   widget_->CloseNow();
 }
 
 }  // namespace test
 }  // namespace views