Add mechanism to auto mount file systems in response to a URL request.

chrome/browser/media_galleries/fileapi/iphoto_file_util_unittest.cc

 // Copyright 2013 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.
 
 #include <map>
 #include <set>
 #include <string>
 #include <vector>
 
 #include "base/bind.h"
@@ skipping 196 matching lines @@
         new TestIPhotoFileUtil(media_path_filter_.get(),
                                iphoto_data_provider_.get())));
 
     file_system_context_ = new fileapi::FileSystemContext(
         base::MessageLoopProxy::current().get(),
         base::MessageLoopProxy::current().get(),
         fileapi::ExternalMountPoints::CreateRefCounted().get(),
         storage_policy.get(),
         NULL,
         additional_providers.Pass(),
+        std::vector<fileapi::URLRequestAutoMountHandler>(),
         profile_dir_.path(),
         content::CreateAllowFileAccessOptions());
   }
 
  protected:
   void TestNonexistentFolder(const std::string& path_append) {
     FileSystemOperation::FileEntryList contents;
     FileSystemURL url = CreateURL(path_append);
     bool completed = false;
     ReadDirectoryTestHelper(operation_runner(), url, &contents, &completed);
@@ skipping 110 matching lines @@
   completed = false;
   ReadDirectoryTestHelper(operation_runner(), url, &contents, &completed);
   ASSERT_TRUE(completed);
   ASSERT_EQ(1u, contents.size());
 
   EXPECT_FALSE(contents.front().is_directory);
   EXPECT_EQ("a.jpg", contents.front().name);
 }
 
 }  // namespace iphoto