Extensions: Send the tab id to platform apps.

chrome/renderer/resources/extensions/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('mediaGalleries');
-
+var blobNatives = requireNative('blob_natives');
 var mediaGalleriesNatives = requireNative('mediaGalleries');
-var blobNatives = requireNative('blob_natives');
+var messaging = require('messaging');
+var sendRequest = require('sendRequest').sendRequest;
 
 var mediaGalleriesMetadata = {};
 
 function createFileSystemObjectsAndUpdateMetadata(response) {
   var result = null;
   mediaGalleriesMetadata = {};  // Clear any previous metadata.
   if (response) {
     result = [];
     for (var i = 0; i < response.length; i++) {
       var filesystem = mediaGalleriesNatives.GetMediaFileSystemObject(
@@ skipping 13 matching lines @@
   // getMediaFileSystems uses a custom callback so that it can instantiate and
   // return an array of file system objects.
   apiFunctions.setCustomCallback('getMediaFileSystems',
                                  function(name, request, response) {
     var result = createFileSystemObjectsAndUpdateMetadata(response);
     if (request.callback)
       request.callback(result);
     request.callback = null;
   });
 
+  apiFunctions.setHandleRequest('addUserSelectedFolder',
+                                function() {
+    var optArgs = {customCallback: this.customCallback};
+    var senderTabId = messaging.currentTabId();
+    if (senderTabId)
+      optArgs['senderTabId'] = senderTabId;
+    sendRequest(this.name, arguments, this.definition.parameters, optArgs);
+  });
+
   // addUserSelectedFolder uses a custom callback so that it can instantiate
   // and return an array of file system objects.
   apiFunctions.setCustomCallback('addUserSelectedFolder',
                                  function(name, request, response) {
     var fileSystems = [];
     var selectedFileSystemName = "";
     if (response && 'mediaFileSystems' in response &&
         'selectedFileSystemIndex' in response) {
       fileSystems = createFileSystemObjectsAndUpdateMetadata(
           response['mediaFileSystems']);
@@ skipping 17 matching lines @@
   });
 
   apiFunctions.setUpdateArgumentsPostValidate('getMetadata',
       function(mediaFile, options, callback) {
     var blobUuid = blobNatives.GetBlobUuid(mediaFile)
     return [blobUuid, options, callback];
   });
 });
 
 exports.binding = binding.generate();