Stop inlining StringBuffer<CharType>::shrink().

Source/wtf/text/StringBuffer.h

 /*
  * Copyright (C) 2008, 2010 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
@@ skipping 33 matching lines @@
     explicit StringBuffer(unsigned length)
     {
         CharType* characters;
         m_data = StringImpl::createUninitialized(length, characters);
     }
 
     ~StringBuffer()
     {
     }
 
-    void shrink(unsigned newLength)
-    {
-        if (m_data->length() == newLength)
-            return;
-        m_data->truncateAssumingIsolated(newLength);
-    }
-
+    void shrink(unsigned newLength);
     void resize(unsigned newLength)
     {
         if (!m_data) {
             CharType* characters;
             m_data = StringImpl::createUninitialized(newLength, characters);
             return;
         }
         if (newLength > m_data->length()) {
             m_data = StringImpl::reallocate(m_data.release(), newLength);
             return;
         }
         shrink(newLength);
     }
 
     unsigned length() const { return m_data ? m_data->length() : 0; }
     CharType* characters() { return length() ? const_cast<CharType*>(m_data->getCharacters<CharType>()) : 0; }
 
     CharType& operator[](unsigned i) { ASSERT_WITH_SECURITY_IMPLICATION(i < length()); return characters()[i]; }
 
     PassRefPtr<StringImpl> release() { return m_data.release(); }
 
 private:
     RefPtr<StringImpl> m_data;
 };
 
+template <typename CharType>
+void StringBuffer<CharType>::shrink(unsigned newLength)
+{
+    ASSERT(m_data);
+    if (m_data->length() == newLength)
+        return;
+    m_data->truncateAssumingIsolated(newLength);
+}
+
 } // namespace WTF
 
 using WTF::StringBuffer;
 
 #endif // StringBuffer_h