merge PrecedenceInfo into TokenType and update all refs

pkg/compiler/lib/src/parser/element_listener.dart

Index: pkg/compiler/lib/src/parser/element_listener.dart
diff --git a/pkg/compiler/lib/src/parser/element_listener.dart b/pkg/compiler/lib/src/parser/element_listener.dart
index c2c83d845b54ce4210829240117de721958cd102..619dbf265adfe0ad33ee5f1375488f72aee9078b 100644
--- a/pkg/compiler/lib/src/parser/element_listener.dart
+++ b/pkg/compiler/lib/src/parser/element_listener.dart
@@ -29,14 +29,13 @@ import '../string_validator.dart' show StringValidator;
 import 'package:front_end/src/fasta/scanner.dart'
     show Keyword, BeginGroupToken, ErrorToken, KeywordToken, StringToken, Token;
 import 'package:front_end/src/fasta/scanner.dart' as Tokens show EOF_TOKEN;
-import 'package:front_end/src/fasta/scanner/precedence.dart' as Precedence
-    show IDENTIFIER_INFO;
 import '../tree/tree.dart';
 import '../util/util.dart' show Link, LinkBuilder;
 import 'package:front_end/src/fasta/parser.dart'
     show Listener, ParserError, optional;
 import 'package:front_end/src/fasta/parser/identifier_context.dart'
     show IdentifierContext;
+import 'package:front_end/src/scanner/token.dart' show TokenType;
 import 'partial_elements.dart'
     show
         PartialClassElement,
@@ -773,8 +772,8 @@ class ElementListener extends Listener {
   /// Finds the preceding token via the begin token of the last AST node pushed
   /// on the [nodes] stack.
   Token synthesizeIdentifier(Token token) {
-    Token synthesizedToken = new StringToken.fromString(
-        Precedence.IDENTIFIER_INFO, '?', token.charOffset);
+    Token synthesizedToken =
+        new StringToken.fromString(TokenType.IDENTIFIER, '?', token.charOffset);
     synthesizedToken.next = token.next;
     return synthesizedToken;
   }