Parameterize Ash unittests to pass with material design enabled

ash/test/ash_md_test_base.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 "ash/test/ash_md_test_base.h"
+
+#include "ash/common/shelf/shelf_constants.h"
+#include "ash/test/material_design_controller_test_api.h"
+
+namespace ash {
+namespace test {
+
+AshMDTestBase::AshMDTestBase() {}
+
+AshMDTestBase::~AshMDTestBase() {}
+
+void AshMDTestBase::SetUp() {
+  AshTestBase::SetUp();
+  const int default_shelf_size = GetShelfConstant(SHELF_SIZE);
+  material_design_state_.reset(
+      new test::MaterialDesignControllerTestAPI(GetParam()));
+  const int md_state_shelf_size = GetShelfConstant(SHELF_SIZE);
+  md_maximized_window_height_offset_ = default_shelf_size - md_state_shelf_size;
+}
+
+void AshMDTestBase::TearDown() {
+  material_design_state_.reset();
+  AshTestBase::TearDown();
+}
+
+int AshMDTestBase::GetMdMaximizedWindowHeightOffset() {
+  return md_maximized_window_height_offset_;
+}
+
+}  // namespace test
+}  // namespace ash