Add support for 'nocompile' to IDL schema compiler.

tools/json_schema_compiler/test/idl_basics.idl

 // Copyright (c) 2012 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 a variety of basic API definition features.
 
 namespace idl_basics {
   enum EnumType {
     name1,
     name2
@@ skipping 27 matching lines @@
     static void function8(long arg1, optional DOMString arg2);
     static void function9(optional MyType1 arg);
 
     static void function10(long x, long[] y);
     static void function11(MyType1[] arg);
 
     static void function12(Callback4 cb);
 
     static void function13(EnumType type, Callback5 cb);
     static void function14(EnumType[] types);
+
+    // "switch" is a reserved word and should cause a C++ compile error if we
+    // emit code for this declaration.
+    [nocompile] static void function15(long switch);
   };
 
   interface Events {
     static void onFoo1();
     static void onFoo2(long x);
     static void onFoo2(MyType1 arg);
     static void onFoo3(EnumType type);
   };
 };