Added ToJson to JSON schema compiler.

tools/json_schema_compiler/test/content_settings.json

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.

[not at google - send to devlin, 2012/07/26 02:39:58]

Does this file need to be included in here? I don't like copying big files like
this for testing, better to make small targeted JSON files. I also don't see it
used anywhere.

But yeah that reminds me, you should add some kind of test for this to exercise
the code paths. E.g. emulate OnObjectFiredCreate in objects_unittest.cc.

[mitchellwrosen, 2012/07/26 17:38:59]

It's used in the setup of CppTypeGeneratorTest. I included it basically just to
test json/json_writer.h not being included in files that don't have events (see
testGenerateIncludesAndForwardDeclarations) I can take it out if you'd like.

I augmented OnObjectFiredCreate a little bit, not sure if that's what you meant.
Since C++ doesn't have reflection I couldn't think of a way to test that
functions *don't* have a ToJson function (testing that events do is easy enough
-- it compiles).

[not at google - send to devlin, 2012/07/26 23:33:37]

I mean to test that ToJson works, like, make some simple test example that would
serialize to something well known, then test the string. Just something simple.

 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 [
   {
     "namespace": "contentSettings",
     "types": [
       {
         "id": "ResourceIdentifier",
         "type": "object",
@@ skipping 200 matching lines @@
         "$ref": "ContentSetting",
         "description": "Whether to allow sites to show desktop notifications. One of<br><var>allow</var>: Allow sites to show desktop notifications,<br><var>block</var>: Don't allow sites to show desktop notifications,<br><var>ask</var>: Ask when a site wants to show desktop notifications. <br>Default is <var>ask</var>.<br>The primary URL is the main-frame URL. The secondary URL is not used.",
         "value": [
           "notifications",
           {"type":"string", "enum": ["allow", "block", "ask"]}
         ]
       }
     }
   }
 ]