General comment cleaning / refactoring for Mac Installer

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
+// when crafting the query to Omaha. This should return either "x84_64h" for
 // systems running on Intel Haswell chips, "i486" for other Intel machines, or
 // strings representing other CPU types ("amd", "pentium", and "i686", for
 // example, are all possible; however, due to the above macro, the possible
 // return strings are limited to either "x84_64h" or "i486").
 + (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_