Initial commit for Chrome metainstaller on Mac.

chrome/installer/mac/app/OmahaXMLRequest.m

Index: chrome/installer/mac/app/OmahaXMLRequest.m
diff --git a/chrome/installer/mac/app/OmahaXMLRequest.m b/chrome/installer/mac/app/OmahaXMLRequest.m
new file mode 100644
index 0000000000000000000000000000000000000000..7cc39bcdf2b27f6f9f0115dc6bd227d2f4d7d8ca
--- /dev/null
+++ b/chrome/installer/mac/app/OmahaXMLRequest.m
@@ -0,0 +1,63 @@
+// Copyright (c) 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.
+
+#import <Foundation/Foundation.h>
+#include "OmahaXMLRequest.h"
+#include "SystemInfo.h"
+
+@implementation OmahaXMLRequest : NSObject
+
+// borisv@ indicated that the OS version, platform, appid, and version are the
+// user attributes that Omaha actually looks at. The other parameters are useful
+// for logging purposes but otherwise not directly used.
++ (NSXMLDocument*)createXMLRequestBody {
+  NSString* protocol = @"3.0";
+  NSString* keystoneVersion = @"KeystoneAgent-1.99.4.0";
+
+  NSString* platform = @"mac";
+  NSString* operatingSystem = [SystemInfo getOSVersion];
+  NSString* architecture = [SystemInfo getArch];
+  NSString* plat_arch = [NSString stringWithFormat:@"%@_%@", operatingSystem,
+                                                    architecture];
+
+  NSString* appid = @"com.google.Chrome";
+  NSString* version = @"0.0.0.0";
+  NSString* language = @"en-us";
+
+  NSXMLElement* root = [[NSXMLElement alloc] initWithName:@"request"];
+  [root addAttribute:[NSXMLNode attributeWithName:@"protocol"
+                                      stringValue:protocol]];
+  [root addAttribute:[NSXMLNode attributeWithName:@"version"
+                                      stringValue:keystoneVersion]];
+
+  NSXMLElement* osChild = [[NSXMLElement alloc] initWithName:@"os"];
+  [osChild addAttribute:[NSXMLNode attributeWithName:@"platform"
+                                         stringValue:platform]];
+  [osChild addAttribute:[NSXMLNode attributeWithName:@"version"
+                                         stringValue:operatingSystem]];
+  [osChild addAttribute:[NSXMLNode attributeWithName:@"arch"
+                                         stringValue:architecture]];
+  [osChild addAttribute:[NSXMLNode attributeWithName:@"sp"
+                                         stringValue:plat_arch]];
+  [root addChild:osChild];
+
+  NSXMLElement* appChild = [[NSXMLElement alloc] initWithName:@"app"];
+  [appChild addAttribute:[NSXMLNode attributeWithName:@"appid"
+                                          stringValue:appid]];
+  [appChild addAttribute:[NSXMLNode attributeWithName:@"version"
+                                          stringValue:version]];
+  [appChild addAttribute:[NSXMLNode attributeWithName:@"lang"
+                                          stringValue:language]];
+  [root addChild:appChild];
+
+  NSXMLElement* updateChildChild = [[NSXMLElement alloc]
+                                    initWithName:@"updatecheck"];
+  [appChild addChild:updateChildChild];
+
+  NSXMLDocument* requestXMLDocument = [[NSXMLDocument alloc]
+                                       initWithRootElement:root];
+  return requestXMLDocument;
+}
+
+@end