Make HttpNetworkLayer subscribe to power events on Windows.

net/http/http_network_layer.cc

Index: net/http/http_network_layer.cc
diff --git a/net/http/http_network_layer.cc b/net/http/http_network_layer.cc
index b7b3048ec4f6290a97b25275917ce2ceccc9c2fb..a8c9400f8315f16d0a5d027f09af45467b9e35ff 100644
--- a/net/http/http_network_layer.cc
+++ b/net/http/http_network_layer.cc
@@ -23,9 +23,19 @@ HttpNetworkLayer::HttpNetworkLayer(HttpNetworkSession* session)
     : session_(session),
       suspended_(false) {
   DCHECK(session_.get());
+#if defined(OS_WIN)
+  base::SystemMonitor* system_monitor = base::SystemMonitor::Get();
+  if (system_monitor)
+    system_monitor->AddPowerObserver(this);
+#endif
 }
 
 HttpNetworkLayer::~HttpNetworkLayer() {
+#if defined(OS_WIN)
+  base::SystemMonitor* system_monitor = base::SystemMonitor::Get();
+  if (system_monitor)
+    system_monitor->RemovePowerObserver(this);
+#endif
 }
 
 //-----------------------------------------------------------------------------