ozone/platform/wayland: Add WaylandTest base class to eliminate redundancy

ui/ozone/platform/wayland/wayland_test.cc

+// Copyright 2016 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 "ui/ozone/platform/wayland/wayland_test.h"
+
+namespace ui {
+
+WaylandTest::WaylandTest()
+    : window(&delegate, &display, gfx::Rect(0, 0, 800, 600)) {}
+
+WaylandTest::~WaylandTest() {}
+
+void WaylandTest::SetUp() {
+  ASSERT_TRUE(server.Start());
+  ASSERT_TRUE(display.Initialize());
+  ASSERT_TRUE(window.Initialize());
+  wl_display_roundtrip(display.display());
+
+  server.Pause();
+
+  surface = server.GetObject<wl::MockSurface>(window.GetWidget());
+  ASSERT_TRUE(surface);
+  initialized = true;
+}
+
+void WaylandTest::TearDown() {
+  server.Resume();
+  if (initialized)
+    wl_display_roundtrip(display.display());
+}
+
+void WaylandTest::Sync() {
+  server.Resume();
+  wl_display_roundtrip(display.display());
+  server.Pause();
+}
+
+}  // namespace ui