Link GCM heartbeat with wake on wifi preference

components/gcm_driver/fake_gcm_client.cc

Index: components/gcm_driver/fake_gcm_client.cc
diff --git a/components/gcm_driver/fake_gcm_client.cc b/components/gcm_driver/fake_gcm_client.cc
index fdf636f2217dbbb714ca3597b262515ee26c457a..ea45c23388767775034b80d70c8f0ca9dd1e8dc3 100644
--- a/components/gcm_driver/fake_gcm_client.cc
+++ b/components/gcm_driver/fake_gcm_client.cc
@@ -11,6 +11,7 @@
 #include "base/strings/string_number_conversions.h"
 #include "base/sys_byteorder.h"
 #include "base/time/time.h"
+#include "base/timer/timer.h"
 #include "google_apis/gcm/base/encryptor.h"
 #include "google_apis/gcm/engine/account_mapping.h"
 #include "net/base/ip_endpoint.h"
@@ -133,6 +134,9 @@ void FakeGCMClient::RemoveAccountMapping(const std::string& account_id) {
 void FakeGCMClient::SetLastTokenFetchTime(const base::Time& time) {
 }
 
+void FakeGCMClient::UpdateHeartbeatTimer(scoped_ptr<base::Timer> timer) {
+}
+
 void FakeGCMClient::PerformDelayedLoading() {
   DCHECK(ui_thread_->RunsTasksOnCurrentThread());