Added activity logging for ext APIs with custom bindings

chrome/renderer/resources/extensions/experimental.media_galleries_custom_bindings.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.
 
 // Custom binding for the Media Gallery API.
 
 var binding = require('binding').Binding.create('experimental.mediaGalleries');
 
 var mediaGalleriesNatives = requireNative('mediaGalleries');
 
 binding.registerCustomHook(function(bindingsAPI, extensionId) {
   var apiFunctions = bindingsAPI.apiFunctions;
 
   // extractEmbeddedThumbnails uses a renderer side handler so that it can
   // synchronously return a result.  The result object's state is computable
   // from the function's input.
   apiFunctions.setHandleRequest('extractEmbeddedThumbnails',
                                 function(fileEntry) {
     return mediaGalleriesNatives.ExtractEmbeddedThumbnails(fileEntry);
-  });
+  }, false);
 });
 
 exports.binding = binding.generate();