Reland of "Added common layout framework for system menu rows."

ui/views/test/test_layout_manager.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/views/test/test_layout_manager.h"
+
+namespace views {
+namespace test {
+
+TestLayoutManager::TestLayoutManager() {}
+
+TestLayoutManager::~TestLayoutManager() {}
+
+void TestLayoutManager::Layout(View* host) {}
+
+gfx::Size TestLayoutManager::GetPreferredSize(const View* host) const {
+  return preferred_size_;
+}
+
+int TestLayoutManager::GetPreferredHeightForWidth(const View* host,
+                                                  int width) const {
+  return preferred_height_for_width_;
+}
+
+}  // namespace test
+}  // namespace views