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

chrome/browser/media_galleries/fileapi/picasa_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 <set>
 #include <string>
 #include <vector>
 
 #include "base/bind_helpers.h"
 #include "base/file_util.h"
@@ skipping 232 matching lines @@
         new TestPicasaFileUtil(media_path_filter_.get(),
                                picasa_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());
   }
 
   virtual void TearDown() OVERRIDE {
     SynchronouslyRunOnMediaTaskRunner(
         base::Bind(&PicasaFileUtilTest::TearDownOnMediaTaskRunner,
                    base::Unretained(this)));
   }
 
@@ skipping 324 matching lines @@
   operation_runner()->CreateSnapshotFile(
       CreateURL(std::string(kPicasaDirAlbums) +
                 "/albumname 2013-04-16/mapped_name.jpg"),
       snapshot_callback);
   loop.Run();
   EXPECT_EQ(base::File::FILE_OK, error);
   EXPECT_EQ(image_path, platform_path_result);
 }
 
 }  // namespace picasa