Remove the enable_task_manager build flag and define.

chrome/browser/net/chrome_network_delegate.cc

 // Copyright (c) 2012 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.
 
 #include "chrome/browser/net/chrome_network_delegate.h"
 
 #include <stddef.h>
 #include <stdlib.h>
 
 #include <vector>
@@ skipping 343 matching lines @@
   extensions_delegate_->OnBeforeRedirect(request, new_location);
 }
 
 void ChromeNetworkDelegate::OnResponseStarted(net::URLRequest* request,
                                               int net_error) {
   extensions_delegate_->OnResponseStarted(request, net_error);
 }
 
 void ChromeNetworkDelegate::OnNetworkBytesReceived(net::URLRequest* request,
                                                    int64_t bytes_received) {
-#if defined(ENABLE_TASK_MANAGER)
+#if !defined(OS_ANDROID)
   // Note: Currently, OnNetworkBytesReceived is only implemented for HTTP jobs,
   // not FTP or other types, so those kinds of bytes will not be reported here.
   task_manager::TaskManagerInterface::OnRawBytesRead(*request, bytes_received);
-#endif  // defined(ENABLE_TASK_MANAGER)
+#endif  // !defined(OS_ANDROID)
 
   ReportDataUsageStats(request, 0 /* tx_bytes */, bytes_received);
 }
 
 void ChromeNetworkDelegate::OnNetworkBytesSent(net::URLRequest* request,
                                                int64_t bytes_sent) {
   ReportDataUsageStats(request, bytes_sent, 0 /* rx_bytes */);
 }
 
 void ChromeNetworkDelegate::OnCompleted(net::URLRequest* request,
@@ skipping 198 matching lines @@
   if (!data_use_aggregator_)
     return;
 
   if (is_data_usage_off_the_record_) {
     data_use_aggregator_->ReportOffTheRecordDataUse(tx_bytes, rx_bytes);
     return;
   }
 
   data_use_aggregator_->ReportDataUse(request, tx_bytes, rx_bytes);
 }