SF: Introduce mock::NativeWindowSurface

Test: Builds
Bug: 74827900
Change-Id: I325521b736b14077d44b24c458ee1ad995273569
(cherry picked from commit b0325674c80439a8c434f4514ddf7268d45dbc87)
diff --git a/services/surfaceflinger/tests/unittests/MockNativeWindowSurface.h b/services/surfaceflinger/tests/unittests/MockNativeWindowSurface.h
new file mode 100644
index 0000000..88d1a9f
--- /dev/null
+++ b/services/surfaceflinger/tests/unittests/MockNativeWindowSurface.h
@@ -0,0 +1,38 @@
+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include <gmock/gmock.h>
+
+#include <system/window.h> // for ANativeWindow
+
+#include "SurfaceFlinger.h" // for base NativeWindowSurface
+
+namespace android {
+namespace mock {
+
+class NativeWindowSurface : public android::NativeWindowSurface {
+public:
+    NativeWindowSurface();
+    ~NativeWindowSurface();
+
+    MOCK_CONST_METHOD0(getNativeWindow, sp<ANativeWindow>());
+    MOCK_METHOD0(preallocateBuffers, void());
+};
+
+} // namespace mock
+} // namespace android