Updates dartc to recognize 'default' keyword on interface and updated factory method syntax

compiler/java/com/google/dart/compiler/parser/ParserErrorCode.java

 package com.google.dart.compiler.parser;
 
 import com.google.dart.compiler.ErrorCode;
 import com.google.dart.compiler.ErrorSeverity;
 import com.google.dart.compiler.SubSystem;
 
 /**
  * {@link ErrorCode}s for parser.
  * <p>
  * The convention in this file (with some exceptions) is that the enumeration name matches at least
  * the beginning default English translation of the message.
  */
 public enum ParserErrorCode implements ErrorCode {
   ABSTRACT_MEMBER_IN_INTERFACE("Abstract members are not allowed in interfaces"),
   CATCH_OR_FINALLY_EXPECTED("catch or finally clause expected."),
   DEFAULT_VALUE_CAN_NOT_BE_SPECIFIED_IN_ABSTRACT(
       "Default values can not be specified in abstract method"),
   DEFAULT_VALUE_CAN_NOT_BE_SPECIFIED_IN_CLOSURE(
       "Default values can not be specified in closure parameter"),
   DEFAULT_VALUE_CAN_NOT_BE_SPECIFIED_IN_INTERFACE(
       "Default values can not be specified in signature of an interface method"),
   DEFAULT_VALUE_CAN_NOT_BE_SPECIFIED_IN_TYPEDEF(
       "Default values can not be specified in closure type definition"),
   DEFAULT_POSITIONAL_PARAMETER("Positional parameters cannot have default values"),
+  DEPRECATED_USE_OF_FACTORY_KEYWORD(ErrorSeverity.WARNING, 
+      "Deprecated use of the 'factory' keyword: use 'default' instead"),
   DISALLOWED_ABSTRACT_KEYWORD("Abstract keyword not allowed here"),
   DISALLOWED_FACTORY_KEYWORD("Factory keyword not allowed here"),
   EXPECTED_ARRAY_OR_MAP_LITERAL("Expected array or map literal"),
   EXPECTED_CASE_OR_DEFAULT("Expected 'case' or 'default'"),
   EXPECTED_CLASS_DECLARATION_LBRACE("Expected '{' in class or interface declaration"),
   EXPECTED_COMMA_OR_RIGHT_BRACE("Expected ',' or '}'"),
   EXPECTED_COMMA_OR_RIGHT_PAREN("Expected ',' or ')', but got '%s'"),
   EXPECTED_EOS("Unexpected token '%s' (expected end of file)"),
   EXPECTED_EXTENDS("Expected 'extends'"),
   EXPECTED_IDENTIFIER("Expected identifier"),
@@ skipping 59 matching lines @@
   }
 
   public ErrorSeverity getErrorSeverity() {
     return severity;
   }
 
   public SubSystem getSubSystem() {
     return SubSystem.PARSER;
   }
 }