Add display::GetDisplayNearestView

chrome/browser/platform_util_mac.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.
 
 #include "chrome/browser/platform_util.h"
 
 #import <Cocoa/Cocoa.h>
 
 #include "base/bind.h"
 #include "base/files/file_path.h"
@@ skipping 62 matching lines @@
 }  // namespace internal
 
 void OpenExternal(Profile* profile, const GURL& url) {
   DCHECK([NSThread isMainThread]);
   NSString* url_string = base::SysUTF8ToNSString(url.spec());
   NSURL* ns_url = [NSURL URLWithString:url_string];
   if (!ns_url || ![[NSWorkspace sharedWorkspace] openURL:ns_url])
     LOG(WARNING) << "NSWorkspace failed to open URL " << url;
 }
 
-gfx::NativeWindow GetTopLevel(gfx::NativeView view) {
-  return [view window];
-}
-
 gfx::NativeView GetViewForWindow(gfx::NativeWindow window) {
   DCHECK(window);
   DCHECK([window contentView]);
   return [window contentView];
 }
 
 gfx::NativeView GetParent(gfx::NativeView view) {
   return nil;
 }
 
@@ skipping 13 matching lines @@
           [[view window] isVisible]);
 }
 
 bool IsSwipeTrackingFromScrollEventsEnabled() {
   SEL selector = @selector(isSwipeTrackingFromScrollEventsEnabled);
   return [NSEvent respondsToSelector:selector]
       && [NSEvent performSelector:selector];
 }
 
 }  // namespace platform_util