Avoid checking for WTFThreadData::staticData in wtfThreadData()

third_party/WebKit/Source/wtf/WTFThreadData.cpp

Index: third_party/WebKit/Source/wtf/WTFThreadData.cpp
diff --git a/third_party/WebKit/Source/wtf/WTFThreadData.cpp b/third_party/WebKit/Source/wtf/WTFThreadData.cpp
index af0e33cf7796b3b1515d282b3d563d0d8729e500..a869cf7a1b583e6b3cbc4905533832878a0932a6 100644
--- a/third_party/WebKit/Source/wtf/WTFThreadData.cpp
+++ b/third_party/WebKit/Source/wtf/WTFThreadData.cpp
@@ -55,4 +55,16 @@ size_t WTFThreadData::threadStackSize() {
 }
 #endif
 
+void WTFThreadData::initializeOnMainThread() {
+  // WTFThreadData is used on main thread before it could possibly be used
+  // on secondary ones, so there is no need for synchronization here.
+  DCHECK(!WTFThreadData::staticData);
+  WTFThreadData::staticData = new ThreadSpecific<WTFThreadData>;
+  WTFThreadData::staticData->initializeOnMainThread();
+}
+
+void WTFThreadData::initializeOnOffThread() {
+  WTFThreadData::staticData->initializeOnOffThread();
+}
+
 }  // namespace WTF