Wires up WorkspaceLayoutManager in mash

mash/wm/test/wm_test_helper.cc

Index: mash/wm/test/wm_test_helper.cc
diff --git a/mash/wm/test/wm_test_helper.cc b/mash/wm/test/wm_test_helper.cc
new file mode 100644
index 0000000000000000000000000000000000000000..4191fe27291b3d589220075399df01968ca07797
--- /dev/null
+++ b/mash/wm/test/wm_test_helper.cc
@@ -0,0 +1,52 @@
+// Copyright 2015 The Chromium Authors. All rights reserved.

[James Cook, 2016/05/19 05:08:22]

nit: 2016

[sky, 2016/05/19 15:14:24]

Done.

+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "mash/wm/test/wm_test_helper.h"
+
+#include "base/message_loop/message_loop.h"
+#include "components/mus/public/cpp/property_type_converters.h"
+#include "components/mus/public/cpp/window_tree_connection.h"
+#include "mash/wm/root_window_controller.h"
+#include "mash/wm/test/wm_test_screen.h"
+#include "mash/wm/window_manager.h"
+#include "mash/wm/window_manager.h"
+#include "mash/wm/window_manager_application.h"
+#include "ui/display/display.h"
+
+namespace mash {
+namespace wm {
+
+WmTestHelper::WmTestHelper() {}
+
+WmTestHelper::~WmTestHelper() {}
+
+void WmTestHelper::Init() {
+  message_loop_.reset(new base::MessageLoopForUI());
+  const uint32_t app_id = 1;
+  window_manager_app_.Initialize(nullptr, shell::Identity(), app_id);
+  screen_ = new WmTestScreen;
+  window_manager_app_.screen_.reset(screen_);
+
+  // RootWindowController controls its own lifetime.
+  RootWindowController* root_window_controller =
+      new RootWindowController(&window_manager_app_);
+  // Need an id other than kInvalidDisplayID so the Display is considered valid.
+  root_window_controller->display_.set_id(1);
+  const gfx::Rect display_bounds(0, 0, 800, 600);
+  root_window_controller->display_.set_bounds(display_bounds);
+  const gfx::Rect work_area(0, 0, display_bounds.width(),
+                            display_bounds.height() - 20);

[James Cook, 2016/05/19 05:08:22]

optional: maybe a constant for the magic -20?

[sky, 2016/05/19 15:14:24]

I added a comment. I don't think it's worth the constant.

+  root_window_controller->display_.set_work_area(work_area);
+
+  screen_->display_list()->AddDisplay(root_window_controller->display(),
+                                      views::DisplayList::Type::PRIMARY);
+
+  window_tree_connection_setup_.Init(
+      root_window_controller, root_window_controller->window_manager_.get());
+  root_window_controller->root()->SetBounds(display_bounds);
+  window_manager_app_.AddRootWindowController(root_window_controller);
+}
+
+}  // namespace wm
+}  // namespace mash