Convert ConnectToApplication to take a params class

sql/mojo/vfs_unittest.cc

 // Copyright 2015 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 <memory>
 
 #include "components/filesystem/public/interfaces/file_system.mojom.h"
 #include "mojo/application/public/cpp/application_impl.h"
 #include "mojo/application/public/cpp/application_test_base.h"
 #include "mojo/util/capture_util.h"
@@ skipping 32 matching lines @@
   }
 
   scoped_ptr<sqlite3_file> MakeFile() {
     return scoped_ptr<sqlite3_file>(reinterpret_cast<sqlite3_file*>(
         new uint8_t[vfs()->szOsFile]));
   }
 
   void SetUp() override {
     mojo::test::ApplicationTestBase::SetUp();
 
-    mojo::URLRequestPtr request(mojo::URLRequest::New());
-    request->url = mojo::String::From("mojo:filesystem");
-    application_impl()->ConnectToService(request.Pass(), &files_);
+    application_impl()->ConnectToService("mojo:filesystem", &files_);
 
     filesystem::FileSystemClientPtr client;
     binding_.Bind(GetProxy(&client));
 
     filesystem::FileError error = filesystem::FILE_ERROR_FAILED;
     filesystem::DirectoryPtr directory;
     files_->OpenFileSystem("temp", GetProxy(&directory), client.Pass(),
                            mojo::Capture(&error));
     ASSERT_TRUE(files_.WaitForIncomingResponse());
     ASSERT_EQ(filesystem::FILE_ERROR_OK, error);
@@ skipping 266 matching lines @@
   EXPECT_EQ(SQLITE_OK, rc);
 
   rc = file->pMethods->xFileSize(file.get(), &size);
   EXPECT_EQ(SQLITE_OK, rc);
   EXPECT_EQ(kCharsToThree, size);
 
   file->pMethods->xClose(file.get());
 }
 
 }  // namespace sql