replace COMPILE_ASSERT with static assert in wtf/

Source/wtf/text/AtomicString.cpp

 /*
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2013 Apple Inc. All rights reserved.
  * Copyright (C) 2010 Patrick Gansterer <paroga@paroga.com>
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
@@ skipping 16 matching lines @@
 #include "wtf/HashSet.h"
 #include "wtf/WTFThreadData.h"
 #include "wtf/dtoa.h"
 #include "wtf/text/IntegerToStringConversion.h"
 #include "wtf/unicode/UTF8.h"
 
 namespace WTF {
 
 using namespace Unicode;
 
-COMPILE_ASSERT(sizeof(AtomicString) == sizeof(String), atomic_string_and_string_must_be_same_size);
+static_assert(sizeof(AtomicString) == sizeof(String), "AtomicString and String must be same size");
 
 class AtomicStringTable {
     WTF_MAKE_NONCOPYABLE(AtomicStringTable);
 public:
     static AtomicStringTable* create(WTFThreadData& data)
     {
         data.m_atomicStringTable = new AtomicStringTable;
         data.m_atomicStringTableDestructor = AtomicStringTable::destroy;
         data.m_atomicStringTable->addStaticStrings();
         return data.m_atomicStringTable;
@@ skipping 459 matching lines @@
 }
 
 #ifndef NDEBUG
 void AtomicString::show() const
 {
     m_string.show();
 }
 #endif
 
 } // namespace WTF