Move files in wtf/ to platform/wtf/ (Part 9).

third_party/WebKit/Source/wtf/text/AtomicStringTable.h

-// Copyright 2016 The Chromium Authors. All rights reserved.
+// Copyright 2017 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef WTF_AtomicStringTable_h
-#define WTF_AtomicStringTable_h
+#include "platform/wtf/text/AtomicStringTable.h"
 
-#include "wtf/Allocator.h"
-#include "wtf/HashSet.h"
-#include "wtf/WTFExport.h"
-#include "wtf/WTFThreadData.h"
-#include "wtf/text/StringHash.h"
-#include "wtf/text/StringImpl.h"
-
-namespace WTF {
-
-// The underlying storage that keeps the map of unique AtomicStrings. This is
-// not thread safe and each WTFThreadData has one.
-class WTF_EXPORT AtomicStringTable final {
-  USING_FAST_MALLOC(AtomicStringTable);
-  WTF_MAKE_NONCOPYABLE(AtomicStringTable);
-
- public:
-  AtomicStringTable();
-  ~AtomicStringTable();
-
-  // Gets the shared table for the current thread.
-  static AtomicStringTable& instance() {
-    return wtfThreadData().getAtomicStringTable();
-  }
-
-  // Used by system initialization to preallocate enough storage for all of
-  // the static strings.
-  void reserveCapacity(unsigned size);
-
-  // Inserting strings into the table. Note that the return value from adding
-  // a UChar string may be an LChar string as the table will attempt to
-  // convert the string to save memory if possible.
-  StringImpl* add(StringImpl*);
-  PassRefPtr<StringImpl> add(const LChar* chars, unsigned length);
-  PassRefPtr<StringImpl> add(const UChar* chars, unsigned length);
-
-  // Adding UTF8.
-  // Returns null if the characters contain invalid utf8 sequences.
-  // Pass null for the charactersEnd to automatically detect the length.
-  PassRefPtr<StringImpl> addUTF8(const char* charactersStart,
-                                 const char* charactersEnd);
-
-  // This is for ~StringImpl to unregister a string before destruction since
-  // the table is holding weak pointers. It should not be used directly.
-  void remove(StringImpl*);
-
- private:
-  template <typename T, typename HashTranslator>
-  inline PassRefPtr<StringImpl> addToStringTable(const T& value);
-
-  HashSet<StringImpl*> m_table;
-};
-
-}  // namespace WTF
-
-using WTF::AtomicStringTable;
-
-#endif
+// The contents of this header was moved to platform/wtf as part of
+// WTF migration project. See the following post for details:
+// https://groups.google.com/a/chromium.org/d/msg/blink-dev/tLdAZCTlcAA/bYXVT8gYCAAJ