General comment cleaning / refactoring for Mac Installer

chrome/installer/mac/app/OmahaCommunication.m

 // 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.
 
 #import "OmahaCommunication.h"
 
 #import "OmahaXMLRequest.h"
 #import "OmahaXMLParser.h"
 
-// TODO: turn this string to a command-line flag
+// TODO: Turn the below string into a command line flag for testing.
 static NSString* const omahaURLPath =
     @"https://tools.google.com/service/update2";
 
 @interface NSURLSession ()
 - (NSURLSessionDataTask*)dataTaskWithRequest:(NSURLRequest*)request
                            completionHandler:
                                (void (^)(NSData* data,
                                          NSURLResponse* response,
                                          NSError* error))completionHandler;
 @end
@@ skipping 38 matching lines @@
           // talking with the Google Update server.
           if (error) {
             [delegate_ omahaCommunication:self onFailure:error];
           } else {
             [delegate_ omahaCommunication:self onSuccess:completeURLs];
           }
         }] resume];
 }
 
 @end