Change scanner buffers to not use utf-8.

src/factory.cc

Index: src/factory.cc
diff --git a/src/factory.cc b/src/factory.cc
index 83af447d918811456094b1a261e95fe4168ab0dc..2bc878cc4dab0a532fc72ddae785779c155689cc 100644
--- a/src/factory.cc
+++ b/src/factory.cc
@@ -99,6 +99,14 @@ Handle<String> Factory::LookupSymbol(Vector<const char> string) {
   CALL_HEAP_FUNCTION(Heap::LookupSymbol(string), String);
 }
 
+Handle<String> Factory::LookupAsciiSymbol(Vector<const char> string) {
+  CALL_HEAP_FUNCTION(Heap::LookupAsciiSymbol(string), String);
+}
+
+Handle<String> Factory::LookupTwoByteSymbol(Vector<const uc16> string) {
+  CALL_HEAP_FUNCTION(Heap::LookupTwoByteSymbol(string), String);
+}
+
 
 Handle<String> Factory::NewStringFromAscii(Vector<const char> string,
                                            PretenureFlag pretenure) {