[IndexedDB] Mojo testing harness.

content/browser/indexed_db/mock_mojo_indexed_db_callbacks.cc

+// 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 "content/browser/indexed_db/mock_mojo_indexed_db_callbacks.h"
+
+namespace content {
+
+MockMojoIndexedDBCallbacks::MockMojoIndexedDBCallbacks() : binding_(this) {}
+MockMojoIndexedDBCallbacks::~MockMojoIndexedDBCallbacks() {}
+
+::indexed_db::mojom::CallbacksAssociatedPtrInfo
+MockMojoIndexedDBCallbacks::CreateInterfacePtrAndBind() {
+  ::indexed_db::mojom::CallbacksAssociatedPtrInfo ptr_info;
+  binding_.Bind(::mojo::MakeRequest(&ptr_info));
+  return ptr_info;
+}
+
+}  // namespace content