Change scanner buffers to not use utf-8.

src/parser.h

Index: src/parser.h
diff --git a/src/parser.h b/src/parser.h
index 70d0e18fdb83dc6beed1c569a2b66310b99b89b1..8623f3845900f9881b62f73d88d9c2dbd0934dde 100644
--- a/src/parser.h
+++ b/src/parser.h
@@ -578,6 +578,26 @@ class Parser {
   bool Check(Token::Value token);
   void ExpectSemicolon(bool* ok);
 
+  Handle<String> LiteralString(PretenureFlag tenured) {
+    if (scanner().is_literal_ascii()) {
+      return Factory::NewStringFromAscii(scanner().literal_ascii_string(),
+                                         tenured);
+    } else {
+      return Factory::NewStringFromTwoByte(scanner().literal_uc16_string(),
+                                           tenured);
+    }
+  }
+
+  Handle<String> NextLiteralString(PretenureFlag tenured) {
+    if (scanner().is_next_literal_ascii()) {
+      return Factory::NewStringFromAscii(scanner().next_literal_ascii_string(),
+                                         tenured);
+    } else {
+      return Factory::NewStringFromTwoByte(scanner().next_literal_uc16_string(),
+                                           tenured);
+    }
+  }
+
   Handle<String> GetSymbol(bool* ok);
 
   // Get odd-ball literals.
@@ -612,11 +632,9 @@ class Parser {
 
   Scope* NewScope(Scope* parent, Scope::Type type, bool inside_with);
 
-  Handle<String> LookupSymbol(int symbol_id,
-                              Vector<const char> string);
+  Handle<String> LookupSymbol(int symbol_id);
 
-  Handle<String> LookupCachedSymbol(int symbol_id,
-                                    Vector<const char> string);
+  Handle<String> LookupCachedSymbol(int symbol_id);
 
   Expression* NewCall(Expression* expression,
                       ZoneList<Expression*>* arguments,