Initial extension bindings for Media Gallery API.

chrome/test/data/extensions/api_test/media_gallery/test.js

+// 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.
+
+var mediaGalleries = chrome.experimental.mediaGalleries;
+
+chrome.test.runTests([
+  function getGalleries() {
+    mediaGalleries.getMediaGalleries(
+        chrome.test.callbackPass(function(results) {
+          chrome.test.assertEq(results, []);

[jstritar, 2012/03/21 00:02:02]

nit: for each of these, I think the body of callbackPass should be indented 2
spaces from the original indentation, rather than from the arguments:

     mediaGalleries.getMediaGalleries(
         chrome.test.callbackPass(function(results) {
       chrome.test.assertEq(results, []);
     }));

[vandebo (ex-Chrome), 2012/03/21 16:17:57]

Hmm, that looks a bit strange to me... instead I pulled the callbacks out to
explicit functions.

+        }));
+  },
+
+  function assembleMediaFile() {
+    mediaGalleries.assembleMediaFile(
+        {},
+        {},
+        chrome.test.callbackPass(function(result) {
+          chrome.test.assertEq(result, null);
+        }));
+  },
+
+  function parseMediaFileMetadata() {
+    mediaGalleries.parseMediaFileMetadata(
+        {},
+        chrome.test.callbackPass(function(result) {
+          chrome.test.assertEq(result, null);
+        }));
+  },
+]);