V8StringResource's v8StringToWebCoreString() should return a StringType

Source/bindings/v8/V8StringResource.cpp

 /*
  * Copyright (C) 2009 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.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 130 matching lines @@
             if (encoding == v8::String::ONE_BYTE_ENCODING)
                 base = static_cast<WebCoreStringResource8*>(resource);
             else
                 base = static_cast<WebCoreStringResource16*>(resource);
             return StringTraits<StringType>::fromStringResource(base);
         }
     }
 
     int length = v8String->Length();
     if (UNLIKELY(!length))
-        return String("");
+        return StringType("");
 
     bool oneByte = v8String->ContainsOnlyOneByte();
     StringType result(oneByte ? StringTraits<StringType>::template fromV8String<true>(v8String, length) : StringTraits<StringType>::template fromV8String<false>(v8String, length));
 
     if (external != Externalize || !v8String->CanMakeExternal())
         return result;
 
     if (result.is8Bit()) {
         WebCoreStringResource8* stringResource = new WebCoreStringResource8(result);
         if (UNLIKELY(!v8String->MakeExternal(stringResource)))
@@ skipping 36 matching lines @@
 
 String int32ToWebCoreString(int value)
 {
     // If we are on the main thread (this should always true for non-workers), call the faster one.
     if (isMainThread())
         return int32ToWebCoreStringFast(value);
     return String::number(value);
 }
 
 } // namespace WebCore