Initial commit for Chrome metainstaller on Mac.

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>
+
+#include "NetworkCommunication.h"
+
+typedef void (^OmahaRequestCompletionHandler)(NSData*, NSError*);
+
+@interface OmahaCommunication : NSObject
+
+@property(nonatomic, copy) NSXMLDocument* requestXMLBody;
+@property(nonatomic, copy) NetworkCommunication* sessionHelper;
+
+- (id)init;
+- (id)initWithBody:(NSXMLDocument*)xmlBody;
+
+// Sends the request created using the session helper.
+- (void)sendRequestWithBlock:(OmahaRequestCompletionHandler)block;
+
+@end
+
+#endif  // CHROME_INSTALLER_MAC_APP_OMAHACOMMUNICATION_H_