Enables WorkspaceLayoutManagerSoloTest.PinnedSuspendsAlwaysOnTop for mash

ash/common/wm/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/session/session_controller.h"
@@ skipping 740 matching lines @@
   // Making fullscreen window normal restores always on top windows.
   fullscreen_window->SetShowState(ui::SHOW_STATE_NORMAL);
   EXPECT_TRUE(always_on_top_window1->IsAlwaysOnTop());
   EXPECT_TRUE(always_on_top_window2->IsAlwaysOnTop());
   EXPECT_TRUE(always_on_top_window3->IsAlwaysOnTop());
   EXPECT_EQ(nullptr, wm::GetWindowForFullscreenMode(fullscreen_window));
 }
 
 // Similary, pinned window causes always_on_top_ windows to stack below.
 TEST_F(WorkspaceLayoutManagerSoloTest, PinnedSuspendsAlwaysOnTop) {
-  // TODO: mash doesn't support pinning yet http://crbug.com/622486.
-  if (WmShell::Get()->IsRunningInMash())
-    return;
-
   gfx::Rect bounds(100, 100, 200, 200);
   std::unique_ptr<aura::Window> pinned_window_owner(
       CreateTestWindowInShellWithBounds(bounds));
   WmWindow* pinned_window = WmWindow::Get(pinned_window_owner.get());
   std::unique_ptr<aura::Window> always_on_top_window1_owner(
       CreateTestWindowInShellWithBounds(bounds));
   WmWindow* always_on_top_window1 =
       WmWindow::Get(always_on_top_window1_owner.get());
   std::unique_ptr<aura::Window> always_on_top_window2_owner(
       CreateTestWindowInShellWithBounds(bounds));
@@ skipping 504 matching lines @@
   window->SetBounds(keyboard_bounds());
   window->GetWindowState()->set_ignore_keyboard_bounds_change(true);
   window->Activate();
 
   EXPECT_EQ(keyboard_bounds(), window->GetBounds());
   ShowKeyboard();
   EXPECT_EQ(keyboard_bounds(), window->GetBounds());
 }
 
 }  // namespace ash