chromeos: wireup more display management for mushrome

ash/system/screen_layout_observer.h

 // 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.
 
 #ifndef ASH_SYSTEM_SCREEN_LAYOUT_OBSERVER_H_
 #define ASH_SYSTEM_SCREEN_LAYOUT_OBSERVER_H_
 
 #include <stdint.h>
 
 #include <map>
@@ skipping 12 matching lines @@
  public:
   ScreenLayoutObserver();
   ~ScreenLayoutObserver() override;
 
   // Overridden from WmDisplayObserver:
   void OnDisplayConfigurationChanged() override;
 
   // Notifications are shown in production and are not shown in unit tests.
   // Allow individual unit tests to show notifications.
   void set_show_notifications_for_testing(bool show) {
-    show_notifications_for_testing = show;
+    show_notifications_for_testing_ = show;
   }
 
  private:
   friend class ScreenLayoutObserverTest;
 
   using DisplayInfoMap = std::map<int64_t, display::ManagedDisplayInfo>;
 
   static const char kNotificationId[];
 
   // Scans the current display info and updates |display_info_|. Sets the
@@ skipping 26 matching lines @@
     EXTENDED_2,       // 2 displays in extended mode.
     EXTENDED_3_PLUS,  // 3+ displays in extended mode.
     MIRRORING,
     UNIFIED,
     DOCKED
   };
 
   DisplayMode old_display_mode_ = DisplayMode::SINGLE;
   DisplayMode current_display_mode_ = DisplayMode::SINGLE;
 
-  bool show_notifications_for_testing = true;
+  bool show_notifications_for_testing_ = true;
 
   DISALLOW_COPY_AND_ASSIGN(ScreenLayoutObserver);
 };
 
 }  // namespace ash
 
 #endif  // ASH_SYSTEM_SCREEN_LAYOUT_OBSERVER_H_