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..26062ae3e776a5f6be943be2eeaf37299125f3c7 100644
--- a/third_party/WebKit/Source/wtf/WTFThreadData.cpp
+++ b/third_party/WebKit/Source/wtf/WTFThreadData.cpp
@@ -41,6 +41,14 @@ WTFThreadData::WTFThreadData()
 
 WTFThreadData::~WTFThreadData() {}
 
+void WTFThreadData::initialize() {
+  // WTFThreadData is used on main thread before it could possibly be used

[esprehn, 2017/02/02 23:24:51]

You can remove this comment now. It's per thread and we don't care about which
one

[Charlie Harrison, 2017/02/02 23:35:38]

Done.

+  // on secondary ones, so there is no need for synchronization here.
+  DCHECK(!WTFThreadData::staticData);
+  WTFThreadData::staticData = new ThreadSpecific<WTFThreadData>;
+  wtfThreadData();
+}
+
 #if OS(WIN) && COMPILER(MSVC)
 size_t WTFThreadData::threadStackSize() {
   // Needed to bootstrap WTFThreadData on Windows, because this value is needed