Tidy DEFINE_(THREAD_SAFE_)STATIC_LOCAL() implementations.

third_party/WebKit/Source/wtf/ThreadingPthreads.cpp

Index: third_party/WebKit/Source/wtf/ThreadingPthreads.cpp
diff --git a/third_party/WebKit/Source/wtf/ThreadingPthreads.cpp b/third_party/WebKit/Source/wtf/ThreadingPthreads.cpp
index fdbc0fbfa38769cf21a0242773546fa6a8e8df2e..85a3976090948bb06a944969aa7b771ef9d023f1 100644
--- a/third_party/WebKit/Source/wtf/ThreadingPthreads.cpp
+++ b/third_party/WebKit/Source/wtf/ThreadingPthreads.cpp
@@ -75,30 +75,16 @@ ThreadIdentifier currentThreadSyscall() {
 
 }  // namespace internal
 
-static Mutex* atomicallyInitializedStaticMutex;
-
 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.
   double_conversion::DoubleToStringConverter::EcmaScriptConverter();
 }
 
-void lockAtomicallyInitializedStaticMutex() {
-  DCHECK(atomicallyInitializedStaticMutex);
-  atomicallyInitializedStaticMutex->lock();
-}
-
-void unlockAtomicallyInitializedStaticMutex() {
-  atomicallyInitializedStaticMutex->unlock();
-}
-
 ThreadIdentifier currentThread() {
   return wtfThreadData().threadId();
 }
@@ -233,11 +219,6 @@ void ThreadCondition::broadcast() {
 #if DCHECK_IS_ON()
 static bool s_threadCreated = false;
 
-bool isAtomicallyInitializedStaticMutexLockHeld() {
-  return atomicallyInitializedStaticMutex &&
-         atomicallyInitializedStaticMutex->locked();
-}
-
 bool isBeforeThreadCreated() {
   return !s_threadCreated;
 }