Makes WorkspaceLayoutManager use ash/wm/common types

ash/wm/aura/wm_globals_aura.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/wm/aura/wm_globals_aura.h"
 
 #include "ash/display/window_tree_host_manager.h"
 #include "ash/session/session_state_delegate.h"
 #include "ash/shell.h"
 #include "ash/shell_delegate.h"
@@ skipping 71 matching lines @@
   std::vector<WmWindow*> wm_windows(windows.size());
   for (size_t i = 0; i < windows.size(); ++i)
     wm_windows[i] = WmWindowAura::Get(windows[i]);
   return wm_windows;
 }
 
 bool WmGlobalsAura::IsForceMaximizeOnFirstRun() {
   return Shell::GetInstance()->delegate()->IsForceMaximizeOnFirstRun();
 }
 
+bool WmGlobalsAura::IsScreenLocked() {
+  return Shell::GetInstance()->session_state_delegate()->IsScreenLocked();
+}
+
 void WmGlobalsAura::LockCursor() {
   ash::Shell::GetInstance()->cursor_manager()->LockCursor();
 }
 
 void WmGlobalsAura::UnlockCursor() {
   ash::Shell::GetInstance()->cursor_manager()->UnlockCursor();
 }
 
 std::vector<WmWindow*> WmGlobalsAura::GetAllRootWindows() {
   aura::Window::Windows root_windows = Shell::GetAllRootWindows();
@@ skipping 55 matching lines @@
                     OnDisplayConfigurationChanged());
 }
 
 void WmGlobalsAura::OnOverviewModeEnded() {
   FOR_EACH_OBSERVER(WmOverviewModeObserver, overview_mode_observers_,
                     OnOverviewModeEnded());
 }
 
 }  // namespace wm
 }  // namespace ash