mash: Migrate ShelfLayoutManager ScreenUtil usage to ash common types.

ash/aura/wm_shell_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/aura/wm_shell_aura.h"
 
 #include <utility>
 
 #include "ash/aura/wm_window_aura.h"
 #include "ash/common/session/session_state_delegate.h"
@@ skipping 78 matching lines @@
 }
 
 const DisplayInfo& WmShellAura::GetDisplayInfo(int64_t display_id) const {
   return Shell::GetInstance()->display_manager()->GetDisplayInfo(display_id);
 }
 
 bool WmShellAura::IsActiveDisplayId(int64_t display_id) const {
   return Shell::GetInstance()->display_manager()->IsActiveDisplayId(display_id);
 }
 
+display::Display WmShellAura::GetFirstDisplay() const {
+  return Shell::GetInstance()
+      ->display_manager()
+      ->software_mirroring_display_list()[0];
+}
+
+bool WmShellAura::IsInUnifiedMode() const {
+  return Shell::GetInstance()->display_manager()->IsInUnifiedMode();
+}
+
 bool WmShellAura::IsForceMaximizeOnFirstRun() {
   return delegate()->IsForceMaximizeOnFirstRun();
 }
 
 bool WmShellAura::IsPinned() {
   return Shell::GetInstance()->screen_pinning_controller()->IsPinned();
 }
 
 void WmShellAura::SetPinnedWindow(WmWindow* window) {
   return Shell::GetInstance()->screen_pinning_controller()->SetPinnedWindow(
@@ skipping 142 matching lines @@
   FOR_EACH_OBSERVER(WmDisplayObserver, display_observers_,
                     OnDisplayConfigurationChanging());
 }
 
 void WmShellAura::OnDisplayConfigurationChanged() {
   FOR_EACH_OBSERVER(WmDisplayObserver, display_observers_,
                     OnDisplayConfigurationChanged());
 }
 
 }  // namespace ash