StringImpl should not be referred from StringImplCF.

Source/wtf/text/AtomicString.h

Index: Source/wtf/text/AtomicString.h
diff --git a/Source/wtf/text/AtomicString.h b/Source/wtf/text/AtomicString.h
index 57e49f0c79a11f7de654383d9ddc45811098f867..9d65251dbc85111f72ac8b4130022e286da02efc 100644
--- a/Source/wtf/text/AtomicString.h
+++ b/Source/wtf/text/AtomicString.h
@@ -148,13 +148,6 @@ public:
 
     static void remove(StringImpl*);
 
-#if USE(CF)
-    AtomicString(CFStringRef s) :  m_string(add(s)) { }
-#endif
-#ifdef __OBJC__
-    AtomicString(NSString* s) : m_string(add((CFStringRef)s)) { }
-    operator NSString*() const { return m_string; }
-#endif
     // AtomicString::fromUTF8 will return a null string if
     // the input data contains invalid UTF-8 sequences.
     static AtomicString fromUTF8(const char*, size_t);
@@ -187,9 +180,6 @@ private:
     }
     static PassRefPtr<StringImpl> addFromLiteralData(const char* characters, unsigned length);
     static PassRefPtr<StringImpl> addSlowCase(StringImpl*);
-#if USE(CF)
-    static PassRefPtr<StringImpl> add(CFStringRef);
-#endif
 
     static AtomicString fromUTF8Internal(const char*, const char*);
 };