Initial commit for Chrome metainstaller on Mac.

chrome/installer/mac/app/SystemInfo.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_SYSTEMINFO_H_
+#define CHROME_INSTALLER_MAC_APP_SYSTEMINFO_H_
+
+#if !defined(__x86_64__)
+#error "Your machine's system architecture may not be compatible with Chrome."
+#endif
+
+#import <Foundation/Foundation.h>
+
+@interface SystemInfo : NSObject
+// Gets the CPU architecture type of the client's system, which will be used
+// when crafting the query to Omaha. This will return either "x84_64h" for
+// systems running on Intel Haswell chips, "x86_64" for other  Intel machines,
+// or strings representing other CPU types ("amd", "pentium", and "i686", for
+// example, are all valid).
++ (NSString*)getArch;
+
+// Gets the operating system version of the client. This function may return
+// values such as "10.11" or "10.10.5".
++ (NSString*)getOSVersion;
+
+@end
+
+#endif  // CHROME_INSTALLER_MAC_APP_SYSTEMINFO_H_