Don't build the task manager into Android builds.

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 "base/base64.h"
 #include "base/logging.h"
 #include "base/metrics/histogram.h"
 #include "chrome/browser/browser_process.h"
@@ skipping 287 matching lines @@
           "wibble.comodoca.com", net::kDNS_TXT, 0 /* flags */,
           Bind(RecordComodoDNSResult, base::Owned(response), start_time),
           response, 0 /* priority */,
           request->net_log());
     }
   }
 }
 
 void ChromeNetworkDelegate::OnRawBytesRead(const net::URLRequest& request,
                                            int bytes_read) {
+#if defined(ENABLE_TASK_MANAGER)
   TaskManager::GetInstance()->model()->NotifyBytesRead(request, bytes_read);
+#endif  // defined(ENABLE_TASK_MANAGER)
 }
 
 void ChromeNetworkDelegate::OnCompleted(net::URLRequest* request,
                                         bool started) {
   if (request->status().status() == net::URLRequestStatus::SUCCESS ||
       request->status().status() == net::URLRequestStatus::HANDLED_EXTERNALLY) {
     bool is_redirect = request->response_headers() &&
         net::HttpResponseHeaders::IsRedirectResponseCode(
             request->response_headers()->response_code());
     if (!is_redirect) {
@@ skipping 78 matching lines @@
           request, &render_process_id, &render_view_id)) {
     BrowserThread::PostTask(
         BrowserThread::UI, FROM_HERE,
         base::Bind(&TabSpecificContentSettings::CookieChanged,
                    render_process_id, render_view_id,
                    request->url(), cookie_line, *options, !allow));
   }
 
   return allow;
 }