Revert of Attempting to resolve a race condition with PowerMonitor

net/url_request/url_request_job.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 "net/url_request/url_request_job.h"
 
 #include "base/bind.h"
 #include "base/compiler_specific.h"
 #include "base/message_loop/message_loop.h"
 #include "base/power_monitor/power_monitor.h"
@@ skipping 18 matching lines @@
       prefilter_bytes_read_(0),
       postfilter_bytes_read_(0),
       filter_input_byte_count_(0),
       filter_needs_more_output_space_(false),
       filtered_read_buffer_len_(0),
       has_handled_response_(false),
       expected_content_size_(-1),
       deferred_redirect_status_code_(-1),
       network_delegate_(network_delegate),
       weak_factory_(this) {
-  base::PowerMonitor::AddObserver(this);
+  base::PowerMonitor* power_monitor = base::PowerMonitor::Get();
+  if (power_monitor)
+    power_monitor->AddObserver(this);
 }
 
 void URLRequestJob::SetUpload(UploadDataStream* upload) {
 }
 
 void URLRequestJob::SetExtraRequestHeaders(const HttpRequestHeaders& headers) {
 }
 
 void URLRequestJob::SetPriority(RequestPriority priority) {
 }
@@ skipping 187 matching lines @@
   return HostPortPair();
 }
 
 void URLRequestJob::OnSuspend() {
   Kill();
 }
 
 void URLRequestJob::NotifyURLRequestDestroyed() {
 }
 
-URLRequestJob::~URLRequestJob() { base::PowerMonitor::RemoveObserver(this); }
+URLRequestJob::~URLRequestJob() {
+  base::PowerMonitor* power_monitor = base::PowerMonitor::Get();
+  if (power_monitor)
+    power_monitor->RemoveObserver(this);
+}
 
 void URLRequestJob::NotifyCertificateRequested(
     SSLCertRequestInfo* cert_request_info) {
   if (!request_)
     return;  // The request was destroyed, so there is no more work to do.
 
   request_->NotifyCertificateRequested(cert_request_info);
 }
 
 void URLRequestJob::NotifySSLCertificateError(const SSLInfo& ssl_info,
@@ skipping 503 matching lines @@
 }
 
 bool URLRequestJob::FilterHasData() {
     return filter_.get() && filter_->stream_data_len();
 }
 
 void URLRequestJob::UpdatePacketReadTimes() {
 }
 
 }  // namespace net