Change scanner buffers to not use utf-8.

src/scanner.h

Index: src/scanner.h
diff --git a/src/scanner.h b/src/scanner.h
index 572778f8ac4688cdc43832a7b2423d378e97cbe0..bdf899b54df4fb53b699a2f5780e672b03f86bda 100644
--- a/src/scanner.h
+++ b/src/scanner.h
@@ -134,8 +134,7 @@ class ExternalTwoByteStringUC16CharacterStream: public UC16CharacterStream {
 class V8JavaScriptScanner : public JavaScriptScanner {
  public:
   V8JavaScriptScanner();
-  void Initialize(UC16CharacterStream* source,
-                  int literal_flags = kAllLiterals);
+  void Initialize(UC16CharacterStream* source);
 };