Add IDL capability to json_schema_compiler.

chrome/common/extensions/api/experimental.dns.idl

Index: chrome/common/extensions/api/experimental.dns.idl
diff --git a/chrome/common/extensions/api/experimental.dns.idl b/chrome/common/extensions/api/experimental.dns.idl
new file mode 100644
index 0000000000000000000000000000000000000000..7fab5ad410fda8b677d68ff94c7e8a9937139188
--- /dev/null
+++ b/chrome/common/extensions/api/experimental.dns.idl
@@ -0,0 +1,28 @@
+// 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.
+
+// File-level comment to appease parser. Eventually this will not be necessary.
+
+[nodoc] namespace experimental.dns {
+
+  dictionary ResolveCallbackResolveInfo {
+    // The result code. Zero indicates success.
+    long resultCode;
+
+    // A string representing the IP address literal. Supplied only if resultCode
+    // indicates success. Note that we presently return only IPv4 addresses.
+    DOMString? address;
+  };
+
+  callback ResolveCallback = void (ResolveCallbackResolveInfo resolveInfo);
+
+  interface Functions {
+    // Resolves the given hostname or IP address literal.
+    // |hostname| : The hostname to resolve.
+    // |callback| : Called when the resolution operation completes.
+    static void resolve(DOMString hostname,
+                        ResolveCallback callback);
+  };
+
+};