Revert CompressibleString (and its UMA)

third_party/WebKit/Source/wtf/WTFThreadData.h

 /*
  * Copyright (C) 2008 Apple Inc. All Rights Reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 18 matching lines @@
 
 #include "wtf/HashMap.h"
 #include "wtf/HashSet.h"
 #include "wtf/Noncopyable.h"
 #include "wtf/ThreadSpecific.h"
 #include "wtf/Threading.h"
 #include "wtf/WTFExport.h"
 #include "wtf/text/StringHash.h"
 #include <memory>
 
-namespace blink {
-
-// TODO(hajimehoshi): CompressibleStringTable should be moved from blink to WTF
-// namespace. Fix this forward declaration when we do this.
-class CompressibleStringTable;
-
-typedef void (*CompressibleStringTableDestructor)(CompressibleStringTable*);
-
-}
-
 namespace WTF {
 
 class AtomicStringTable;
 struct ICUConverterWrapper;
 
 class WTF_EXPORT WTFThreadData {
     DISALLOW_NEW_EXCEPT_PLACEMENT_NEW();
     WTF_MAKE_NONCOPYABLE(WTFThreadData);
 public:
     WTFThreadData();
     ~WTFThreadData();
 
     AtomicStringTable& getAtomicStringTable()
     {
         return *m_atomicStringTable;
     }
 
-    blink::CompressibleStringTable* compressibleStringTable()
-    {
-        return m_compressibleStringTable;
-    }
-
     ICUConverterWrapper& cachedConverterICU() { return *m_cachedConverterICU; }
 
 private:
     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 blink::CompressibleStringTable;
 };
 
 inline WTFThreadData& wtfThreadData()
 {
     // WTFThreadData is used on main thread before it could possibly be used
     // on secondary ones, so there is no need for synchronization here.
     if (!WTFThreadData::staticData)
         WTFThreadData::staticData = new ThreadSpecific<WTFThreadData>;
     return **WTFThreadData::staticData;
 }
 
 } // namespace WTF
 
 using WTF::WTFThreadData;
 using WTF::wtfThreadData;
 
 #endif // WTFThreadData_h