Optimize WebURL -> GURL conversions

Source/weborigin/KURL.cpp

 /*
  * Copyright (C) 2004, 2007, 2008, 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2012 Research In Motion Limited. All rights reserved.
  * Copyright (C) 2008, 2009, 2011 Google 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.
@@ skipping 188 matching lines @@
     init(base, relative, 0);
 }
 
 // Constructs a new URL given a base URL and a possibly relative input URL.
 // Any query portion of the relative URL will be encoded in the given encoding.
 KURL::KURL(const KURL& base, const String& relative, const WTF::TextEncoding& encoding)
 {
     init(base, relative, &encoding.encodingForFormSubmission());
 }
 
-KURL::KURL(const CString& canonicalSpec, const url_parse::Parsed& parsed, bool isValid)
+KURL::KURL(const AtomicString& canonicalString, const url_parse::Parsed& parsed, bool isValid)
     : m_isValid(isValid)
     , m_protocolIsInHTTPFamily(false)
     , m_parsed(parsed)
-    , m_string(AtomicString::fromUTF8(canonicalSpec.data(), canonicalSpec.length()))
+    , m_string(canonicalString)
 {
     initProtocolIsInHTTPFamily();
     initInnerURL();
 }
 
 KURL::KURL(WTF::HashTableDeletedValueType)
     : m_isValid(false)
     , m_protocolIsInHTTPFamily(false)
     , m_string(WTF::HashTableDeletedValue)
 {
@@ skipping 613 matching lines @@
     m_string = AtomicString::fromUTF8(output.data(), output.length());
 }
 
 bool KURL::isSafeToSendToAnotherThread() const
 {
     return m_string.isSafeToSendToAnotherThread()
         && (!m_innerURL || m_innerURL->isSafeToSendToAnotherThread());
 }
 
 } // namespace WebCore