Migrate mac installer to delegate-driven model

chrome/installer/mac/app/NetworkCommunication.m

Index: chrome/installer/mac/app/NetworkCommunication.m
diff --git a/chrome/installer/mac/app/NetworkCommunication.m b/chrome/installer/mac/app/NetworkCommunication.m
index d19566a1e0188cd7a0d61bbbd0f09abc39275e02..4347a17758e0f165e593f44fc79ad59645e5822b 100644
--- a/chrome/installer/mac/app/NetworkCommunication.m
+++ b/chrome/installer/mac/app/NetworkCommunication.m
@@ -2,8 +2,6 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#import <Foundation/Foundation.h>
-
 #import "NetworkCommunication.h"
 
 @implementation NetworkCommunication : NSObject
@@ -11,7 +9,6 @@
 @synthesize session = session_;
 @synthesize request = request_;
 @synthesize dataResponseHandler = dataResponseHandler_;
-@synthesize downloadResponseHandler = downloadResponseHandler_;
 
 - (id)init {
   return [self initWithDelegate:nil];
@@ -41,24 +38,21 @@
   return request_;
 }
 
-- (void)sendDataRequestWithCompletionHandler:
-    (DataTaskCompletionHandler)completionHandler {
-  dataResponseHandler_ = completionHandler;
-  NSURLSessionDataTask* dataTask =
-      [session_ dataTaskWithRequest:request_
-                  completionHandler:dataResponseHandler_];
+- (void)sendDataRequest {
+  NSURLSessionDataTask* dataTask;
+  if (dataResponseHandler_) {
+    dataTask = [session_ dataTaskWithRequest:request_
+                           completionHandler:dataResponseHandler_];
+  } else {
+    dataTask = [session_ dataTaskWithRequest:request_];
+  }
 
   [dataTask resume];
 }
 
 - (void)sendDownloadRequest {
-  NSURLSessionDownloadTask* downloadTask;
-  if (downloadResponseHandler_) {
-    downloadTask = [session_ downloadTaskWithRequest:request_
-                                   completionHandler:downloadResponseHandler_];
-  } else {
-    downloadTask = [session_ downloadTaskWithRequest:request_];
-  }
+  NSURLSessionDownloadTask* downloadTask =
+      [session_ downloadTaskWithRequest:request_];
   [downloadTask resume];
 }