move HelloWorld to be a peer of SampleApp

example/mac/HelloWorldDelegate.h

 
 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 #import <Cocoa/Cocoa.h>
 #import "SkSampleNSView.h"
 #import "SkOptionsTableView.h"
-@interface SampleAppDelegate : NSObject <NSApplicationDelegate> {
+@interface HelloWorldDelegate : NSObject <NSApplicationDelegate> {
     NSWindow* fWindow;
     SkSampleNSView* fView;
     SkOptionsTableView* fOptions;
 }
 
 @property (assign) IBOutlet NSWindow* fWindow;
 @property (assign) IBOutlet SkSampleNSView* fView;
 @property (assign) IBOutlet SkOptionsTableView* fOptions;
 
 - (IBAction)toiPadSize:(id)sender;
 
 - (NSApplicationTerminateReply)applicationShouldTerminate:(NSApplication *)sender;
 
 @end