Initial commit for Chrome metainstaller on Mac.

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 <Foundation/Foundation.h>
+#include "OmahaCommunication.h"
+
+@implementation OmahaCommunication : NSObject
+
+@synthesize requestXMLBody;
+@synthesize sessionHelper;
+
+- (id)init {
+  return [self initWithBody:[[NSXMLDocument alloc] init]];
+}
+- (id)initWithBody:(NSXMLDocument*) xmlBody {
+  if ((self = [super init])) {
+    sessionHelper = [[NetworkCommunication alloc] init];
+    requestXMLBody = xmlBody;
+    [self createOmahaRequest];
+  }
+  return self;
+}
+
+- (NSURLRequest*)createOmahaRequest {
+  NSMutableURLRequest* request = [sessionHelper
+      createRequestWithURLasString:@"https://tools.google.com/service/update2"
+                           andXMLBody:requestXMLBody];
+  request.HTTPMethod = @"POST";
+  return request;
+}
+
+- (void)sendRequestWithBlock:(OmahaRequestCompletionHandler) block {
+  DataTaskCompletionHandler cHandler = ^(NSData* _Nullable data,
+                          NSURLResponse* _Nullable response,
+                          NSError* _Nullable error) {
+    if (error) {
+      NSLog(@"%@", error);
+      block(data, error);
+      return;
+    }
+
+    NSHTTPURLResponse* HTTPResponse = (NSHTTPURLResponse*)response;
+    if (HTTPResponse.statusCode != 200) {
+      NSLog(@"HTTP response: %ld", (unsigned long)HTTPResponse.statusCode);
+    }
+
+    block(data, error);
+
+  };
+
+  [sessionHelper sendDataRequestWithCompletionHandler:cHandler];
+}
+
+@end