Add support for 'nocompile' to IDL schema compiler.

chrome/common/extensions/api/experimental_idltest.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.
 
 // An API to test IDL schema specifications.
 
 [nodoc] namespace experimental.idltest {
 
   callback LongArrayCallback = void(long[] array);
   callback ArrayBufferCallback = void(ArrayBuffer buffer);
 
   interface Functions {
     // Functions for testing binary data request/response parameters. The first
     // two just return back the bytes they were passed in an array.
     static void sendArrayBuffer(ArrayBuffer input, LongArrayCallback cb);
 
     // TODO(asargent) - we currently can't have [instanceOf=ArrayBufferView],
     // I think because ArrayBufferView isn't an instantiable type. The best
     // we might be able to do is have a 'choices' list including all the
     // typed array subclasses like Uint8Array, Uint16Array, Float32Array, etc.
     static void sendArrayBufferView([instanceOf=Uint8Array] object input,
                                     LongArrayCallback cb);
     static void getArrayBuffer(ArrayBufferCallback cb);
+
+    // This function should not have C++ code autogenerated (the variable name
+    // |switch| should cause compile errors if it does). But the name should
+    // get defined and made visible from within extensions/apps code.
+    [nocompile] static void nocompileFunc(long switch);
   };
 
 };