Update Lexer/Parser to support '#inline' and 'label'

ppapi/generators/test_parser/struct.idl

 /* Copyright (c) 2011 The Chromium Authors. All rights reserved.
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 /* Tests for structures */
 
 /* OK Struct(S1) */
 struct S1 {
   /* OK Member(Mem1) */
   PP_Bool Mem1;
   /* OK Member(Mem2) */
   PP_Resource Mem2;
 };
 
-typedef int[] func(int x, int y);
+typedef int func([in] int x, [in] int y);
 
 /* OK Struct(S2) */
 struct S2 {
   /* OK Member(Mem1) */
   PP_Bool Mem1;
   /* OK Member(Mem2) */
   PP_Resource Mem2;
   /* OK Member(Mem3) */
-  [ATTRIBUTE] PP_Resource Mem3;
+  [attr1, attr2] PP_Resource Mem3;
   /* OK Member(foo) */
   FuncFoo foo;
 };
 
 /* FAIL Struct missing name. */
 struct {
   PP_Bool Mem1;
   PP_Resource Mem2;
 };