Initial commit for Chrome metainstaller on Mac.

chrome/installer/mac/app/OmahaXMLParser.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_OMAHAXMLPARSER_H_
+#define CHROME_INSTALLER_MAC_APP_OMAHAXMLPARSER_H_
+
+#import <Foundation/Foundation.h>
+
+@interface OmahaXMLParser : NSObject<NSXMLParserDelegate> {
+  NSMutableArray* chromeIncompleteDownloadURLs_;
+  NSString* chromeImageFilename_;
+}
+
+- (NSMutableArray*)chromeIncompleteDownloadURLs;
+
+- (NSString*)chromeImageFilename;
+
+// Parses an XML document and extracts all the URL's it finds as well as the
+// filename. Adds each URL into the array chromeIncompleteDownloadURLs_.
+- (NSArray*)parseXML:(NSData*)omahaResponseXML error:(NSError**)error;
+
+@end
+
+#endif  // CHROME_INSTALLER_MAC_APP_OMAHAXMLPARSER_H_