Don't lazy allocate the AtomicStringTable.

third_party/WebKit/Source/wtf/WTFThreadData.h

Index: third_party/WebKit/Source/wtf/WTFThreadData.h
diff --git a/third_party/WebKit/Source/wtf/WTFThreadData.h b/third_party/WebKit/Source/wtf/WTFThreadData.h
index 3460e932245042fb3a3544aecf90779e4647acf2..b81e0f4697afab19c88f90ba2e96b19ba8ab556b 100644
--- a/third_party/WebKit/Source/wtf/WTFThreadData.h
+++ b/third_party/WebKit/Source/wtf/WTFThreadData.h
@@ -33,6 +33,7 @@
 #include "wtf/ThreadSpecific.h"
 #include "wtf/Threading.h"
 #include "wtf/WTFExport.h"
+#include "wtf/text/AtomicStringTable.h"
 #include "wtf/text/StringHash.h"
 #include <memory>
 
@@ -48,11 +49,8 @@ typedef void (*CompressibleStringTableDestructor)(CompressibleStringTable*);
 
 namespace WTF {
 
-class AtomicStringTable;
 struct ICUConverterWrapper;
 
-typedef void (*AtomicStringTableDestructor)(AtomicStringTable*);
-
 class WTF_EXPORT WTFThreadData {
     DISALLOW_NEW_EXCEPT_PLACEMENT_NEW();
     WTF_MAKE_NONCOPYABLE(WTFThreadData);
@@ -60,9 +58,9 @@ public:
     WTFThreadData();
     ~WTFThreadData();
 
-    AtomicStringTable* getAtomicStringTable()
+    AtomicStringTable& getAtomicStringTable()
     {
-        return m_atomicStringTable;
+        return *m_atomicStringTable;
     }
 
     blink::CompressibleStringTable* compressibleStringTable()
@@ -73,15 +71,13 @@ public:
     ICUConverterWrapper& cachedConverterICU() { return *m_cachedConverterICU; }
 
 private:
-    AtomicStringTable* m_atomicStringTable;
-    AtomicStringTableDestructor m_atomicStringTableDestructor;
+    std::unique_ptr<AtomicStringTable> m_atomicStringTable;
     blink::CompressibleStringTable* m_compressibleStringTable;
     blink::CompressibleStringTableDestructor m_compressibleStringTableDestructor;
     std::unique_ptr<ICUConverterWrapper> m_cachedConverterICU;
 
     static ThreadSpecific<WTFThreadData>* staticData;
     friend WTFThreadData& wtfThreadData();
-    friend class AtomicStringTable;
     friend class blink::CompressibleStringTable;
 };