Access singletons with a new GetInstance() method instead of Singleton<T>.

base/debug/trace_event.cc

Index: base/debug/trace_event.cc
diff --git a/base/debug/trace_event.cc b/base/debug/trace_event.cc
index 4d1d3156f2fb794a232d9b2561d7b446ab918bcb..f50422cb17d944de17bee7d5c06b6b2fd9fc8e68 100644
--- a/base/debug/trace_event.cc
+++ b/base/debug/trace_event.cc
@@ -45,15 +45,18 @@ TraceLog::~TraceLog() {
 }
 
 // static
+TraceLog* TraceLog::GetInstance() {
+  return Singleton<TraceLog, DefaultSingletonTraits<TraceLog> >::get();
+}
+
+// static
 bool TraceLog::IsTracing() {
-  TraceLog* trace = Singleton<TraceLog>::get();
-  return trace->enabled_;
+  return TraceLog::GetInstance()->enabled_;
 }
 
 // static
 bool TraceLog::StartTracing() {
-  TraceLog* trace = Singleton<TraceLog>::get();
-  return trace->Start();
+  return TraceLog::GetInstance()->Start();
 }
 
 bool TraceLog::Start() {
@@ -70,8 +73,7 @@ bool TraceLog::Start() {
 
 // static
 void TraceLog::StopTracing() {
-  TraceLog* trace = Singleton<TraceLog>::get();
-  return trace->Stop();
+  return TraceLog::GetInstance()->Stop();
 }
 
 void TraceLog::Stop() {