Centralizes more shared code between ash and mash

ash/mus/workspace/workspace_layout_manager_unittest.cc

 // Copyright (c) 2012 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/common/wm/workspace/workspace_layout_manager.h"
 
 #include <string>
 #include <utility>
 
 #include "ash/common/shell_observer.h"
@@ skipping 63 matching lines @@
   DISALLOW_COPY_AND_ASSIGN(FullscreenObserver);
 };
 
 }  // namespace
 
 using WorkspaceLayoutManagerTest = WmTestBase;
 
 // Verifies that a window containing a restore coordinate will be restored to
 // to the size prior to minimize, keeping the restore rectangle in tact (if
 // there is one).
-// TODO: disabled because of http://crbug.com/615552.
-TEST_F(WorkspaceLayoutManagerTest, DISABLED_RestoreFromMinimizeKeepsRestore) {
+TEST_F(WorkspaceLayoutManagerTest, RestoreFromMinimizeKeepsRestore) {
   ui::Window* mus_window = CreateTestWindow(gfx::Rect(1, 2, 3, 4));
   WmWindow* window = WmWindowMus::Get(mus_window);
   WmWindowMusTestApi(window).set_use_empty_minimum_size(true);
   gfx::Rect bounds(10, 15, 25, 35);
   window->SetBounds(bounds);
 
   wm::WindowState* window_state = window->GetWindowState();
 
   // This will not be used for un-minimizing window.
   window_state->SetRestoreBoundsInScreen(gfx::Rect(0, 0, 100, 100));
@@ skipping 996 matching lines @@
                       occluded_window_bounds.width(),
                       occluded_window_bounds.height()).ToString(),
             window->bounds().ToString());
   HideKeyboard();
   EXPECT_EQ(occluded_window_bounds.ToString(), window->bounds().ToString());
 }
 */
 
 }  // namespace mus
 }  // namespace ash