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 = requestXMLBody_;
+@synthesize sessionHelper = 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 {
+  // TODO: turn this string to a comand-line flag
+  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) {
+          // TODO: make these logging statements more rare
+          NSLog(@"HTTP response: %ld", (unsigned long)HTTPResponse.statusCode);
+        }
+
+        block(data, error);
+
+      };
+
+  [sessionHelper_ sendDataRequestWithCompletionHandler:cHandler];
+}
+
+@end