Tidy DEFINE_(THREAD_SAFE_)STATIC_LOCAL() implementations.

third_party/WebKit/Source/wtf/ThreadingWin.cpp

Index: third_party/WebKit/Source/wtf/ThreadingWin.cpp
diff --git a/third_party/WebKit/Source/wtf/ThreadingWin.cpp b/third_party/WebKit/Source/wtf/ThreadingWin.cpp
index 420a0b122ffd267296f9644c05f9517f25ad3431..44c81a573568b4c0ebd6952dc44647241e39ae66 100644
--- a/third_party/WebKit/Source/wtf/ThreadingWin.cpp
+++ b/third_party/WebKit/Source/wtf/ThreadingWin.cpp
@@ -125,8 +125,6 @@ typedef struct tagTHREADNAME_INFO {
 } THREADNAME_INFO;
 #pragma pack(pop)
 
-static Mutex* atomicallyInitializedStaticMutex;
-
 namespace internal {
 
 ThreadIdentifier currentThreadSyscall() {
@@ -135,22 +133,10 @@ ThreadIdentifier currentThreadSyscall() {
 
 }  // namespace internal
 
-void lockAtomicallyInitializedStaticMutex() {
-  DCHECK(atomicallyInitializedStaticMutex);
-  atomicallyInitializedStaticMutex->lock();
-}
-
-void unlockAtomicallyInitializedStaticMutex() {
-  atomicallyInitializedStaticMutex->unlock();
-}
-
 void initializeThreading() {
   // This should only be called once.
-  DCHECK(!atomicallyInitializedStaticMutex);
-
   WTFThreadData::initialize();
 
-  atomicallyInitializedStaticMutex = new Mutex;
   initializeDates();
   // Force initialization of static DoubleToStringConverter converter variable
   // inside EcmaScriptConverter function while we are in single thread mode.
@@ -397,11 +383,6 @@ DWORD absoluteTimeToWaitTimeoutInterval(double absoluteTime) {
 #if DCHECK_IS_ON()
 static bool s_threadCreated = false;
 
-bool isAtomicallyInitializedStaticMutexLockHeld() {
-  return atomicallyInitializedStaticMutex &&
-         atomicallyInitializedStaticMutex->locked();
-}
-
 bool isBeforeThreadCreated() {
   return !s_threadCreated;
 }