Add support for two byte strings in direct call to RegExp...

src/objects.h

Index: src/objects.h
===================================================================
--- src/objects.h	(revision 3670)
+++ src/objects.h	(working copy)
@@ -3649,6 +3649,8 @@
       FixedArray::kHeaderSize + kTagIndex * kPointerSize;
   static const int kDataAsciiCodeOffset =
       FixedArray::kHeaderSize + kIrregexpASCIICodeIndex * kPointerSize;
+  static const int kDataUC16CodeOffset =
+      FixedArray::kHeaderSize + kIrregexpUC16CodeIndex * kPointerSize;
   static const int kIrregexpCaptureCountOffset =
       FixedArray::kHeaderSize + kIrregexpCaptureCountIndex * kPointerSize;
 };