Move most scanner buffer accesses into scanner.

src/parser.h

Index: src/parser.h
diff --git a/src/parser.h b/src/parser.h
index 799ec5860d55bbc89f69d0b61c0bfc4990a2fe52..4bdf65957d57b6d70dfd63aabf4912154905baca 100644
--- a/src/parser.h
+++ b/src/parser.h
@@ -704,16 +704,6 @@ class Parser : public ParserBase<ParserTraits> {
 
   bool CheckInOrOf(bool accept_OF, ForEachStatement::VisitMode* visit_mode);
 
-  Handle<String> LiteralString(PretenureFlag tenured) {
-    if (scanner()->is_literal_ascii()) {
-      return isolate_->factory()->NewStringFromAscii(
-          scanner()->literal_ascii_string(), tenured);
-    } else {
-      return isolate_->factory()->NewStringFromTwoByte(
-            scanner()->literal_utf16_string(), tenured);
-    }
-  }
-
   // Get odd-ball literals.
   Literal* GetLiteralUndefined(int position);