Support array types for function and callback arguments in IDL APIs.

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 {
   dictionary MyType1 {
     long x;
     DOMString y;
   };
 
   dictionary MyType2 {
     DOMString x;
   };
 
   callback Callback1 = void();
   callback Callback2 = void(long x);
   callback Callback3 = void(MyType1 arg);
+  callback Callback4 = void(MyType2[] arg);
 
   interface Functions {
     static void function1();
     static void function2(long x);
     static void function3(MyType1 arg);
 
     static void function4(Callback1 cb);
     static void function5(Callback2 cb);
     static void function6(Callback3 cb);
 
     static void function7(optional long arg);
     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);
   };
 
   interface Events {
     static void onFoo1();
     static void onFoo2(long x);
     static void onFoo2(MyType1 arg);
   };
 };