remove memoryinstrumentation

Source/wtf/text/StringImpl.h

Index: Source/wtf/text/StringImpl.h
diff --git a/Source/wtf/text/StringImpl.h b/Source/wtf/text/StringImpl.h
index fbb8921b08b69ebe1228c56aa5c5b10d95c5b300..935b053a5d71e1ec0500fe849d5e67ebba3d7e20 100644
--- a/Source/wtf/text/StringImpl.h
+++ b/Source/wtf/text/StringImpl.h
@@ -46,7 +46,6 @@ template<typename CharacterType> struct HashAndCharactersTranslator;
 struct HashAndUTF8CharactersTranslator;
 struct LCharBufferTranslator;
 struct CharBufferFromLiteralDataTranslator;
-class MemoryObjectInfo;
 struct SubstringTranslator;
 struct UCharBufferTranslator;
 template<typename> class RetainPtr;
@@ -410,9 +409,6 @@ public:
 
     unsigned length() const { return m_length; }
     bool is8Bit() const { return m_hashAndFlags & s_hashFlag8BitBuffer; }
-    bool hasInternalBuffer() const { return bufferOwnership() == BufferInternal; }
-    bool hasOwnedBuffer() const { return bufferOwnership() == BufferOwned; }
-    StringImpl* baseString() const { return bufferOwnership() == BufferSubstring ? m_substringBuffer : 0; }
 
     // FIXME: Remove all unnecessary usages of characters()
     ALWAYS_INLINE const LChar* characters8() const { ASSERT(is8Bit()); return m_data8; }
@@ -682,7 +678,7 @@ private:
 
     bool isASCIILiteral() const
     {
-        return is8Bit() && hasInternalBuffer() && reinterpret_cast<const void*>(m_data8) != reinterpret_cast<const void*>(this + 1);
+        return is8Bit() && bufferOwnership() == BufferInternal && reinterpret_cast<const void*>(m_data8) != reinterpret_cast<const void*>(this + 1);
     }
 
     // This number must be at least 2 to avoid sharing empty, null as well as 1 character strings from SmallStrings.