Defer ARC file system operations while ARC is booting.

components/arc/file_system/test/fake_arc_file_system_operation_runner.cc

Index: components/arc/file_system/test/fake_arc_file_system_operation_runner.cc
diff --git a/components/arc/file_system/test/fake_arc_file_system_operation_runner.cc b/components/arc/file_system/test/fake_arc_file_system_operation_runner.cc
new file mode 100644
index 0000000000000000000000000000000000000000..a6fa63921d329a573265411028bff767529ff58a
--- /dev/null
+++ b/components/arc/file_system/test/fake_arc_file_system_operation_runner.cc
@@ -0,0 +1,33 @@
+// Copyright 2017 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 "components/arc/file_system/test/fake_arc_file_system_operation_runner.h"
+
+namespace arc {
+
+FakeArcFileSystemOperationRunner::FakeArcFileSystemOperationRunner(
+    ArcBridgeService* bridge_service)
+    : ArcFileSystemOperationRunner(bridge_service) {}
+
+FakeArcFileSystemOperationRunner::~FakeArcFileSystemOperationRunner() = default;
+
+void FakeArcFileSystemOperationRunner::GetFileSize(
+    const std::string& url,
+    const GetFileSizeCallback& callback) {}
+
+void FakeArcFileSystemOperationRunner::OpenFileToRead(
+    const std::string& url,
+    const OpenFileToReadCallback& callback) {}
+
+void FakeArcFileSystemOperationRunner::GetDocument(
+    const std::string& authority,
+    const std::string& document_id,
+    const GetDocumentCallback& callback) {}
+
+void FakeArcFileSystemOperationRunner::GetChildDocuments(
+    const std::string& authority,
+    const std::string& parent_document_id,
+    const GetChildDocumentsCallback& callback) {}
+
+}  // namespace arc