Added unpacking step

chrome/installer/mac/app/OmahaCommunication.h

 // Copyright 2016 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.
 
 #ifndef CHROME_INSTALLER_MAC_APP_OMAHACOMMUNICATION_H_
 #define CHROME_INSTALLER_MAC_APP_OMAHACOMMUNICATION_H_
 
 #import <Foundation/Foundation.h>
 
+@class OmahaCommunication;
 @protocol OmahaCommunicationDelegate
-- (void)onOmahaSuccessWithURLs:(NSArray*)URLs;
-- (void)onOmahaFailureWithError:(NSError*)error;
+- (void)omahaCommunication:(OmahaCommunication*)messenger
+    onOmahaSuccessWithURLs:(NSArray*)URLs;
+- (void)omahaCommunication:(OmahaCommunication*)messenger
+    onOmahaFailureWithError:(NSError*)error;

[Sidney San Martín, 2016/08/13 12:37:18]

Since you added `omahaCommunication:` to these names, the second part doesn't
have to mention Omaha too.

[Anna Zeng, 2016/08/16 23:07:39]

Done.

 @end
 
 @interface OmahaCommunication : NSObject<NSURLSessionDataDelegate>
 
 @property(nonatomic, copy) NSXMLDocument* requestXMLBody;
 @property(nonatomic, assign) id<OmahaCommunicationDelegate> delegate;
 
 - (id)init;
 - (id)initWithBody:(NSXMLDocument*)xmlBody;
 
 // Asks the Omaha servers for the most updated version of Chrome by sending a
 // request using this function.
 - (void)fetchDownloadURLs;
 
 @end
 
 #endif  // CHROME_INSTALLER_MAC_APP_OMAHACOMMUNICATION_H_