Always redraw the content when display configuration has changed

ash/display/display_controller.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/display/display_controller.h"
 
 #include <algorithm>
 #include <cmath>
 #include <map>
 
@@ skipping 135 matching lines @@
       CreateRootWindowTransformerForDisplay(host->window(), display));
   ash_host->SetRootWindowTransformer(transformer.Pass());
 
   DisplayMode mode =
       GetDisplayManager()->GetActiveModeForDisplayId(display.id());
   if (mode.refresh_rate > 0.0f) {
     host->compositor()->vsync_manager()->SetAuthoritativeVSyncInterval(
         base::TimeDelta::FromMicroseconds(
             base::Time::kMicrosecondsPerSecond / mode.refresh_rate));
   }
+
+  // Just movnig the display requires the full redraw.
+  // chrome-os-partner:33558.
+  host->compositor()->ScheduleFullRedraw();
 }
 
 void ClearDisplayPropertiesOnHost(AshWindowTreeHost* ash_host,
                                   const gfx::Display& display) {
 #if defined(OS_CHROMEOS) && defined(USE_OZONE)
   aura::WindowTreeHost* host = ash_host->AsWindowTreeHost();
   ui::CursorController::GetInstance()->ClearCursorConfigForWindow(
       host->GetAcceleratedWidget());
 #endif
 }
@@ skipping 640 matching lines @@
     std::string name =
         root_windows[i] == primary ? "aura_root_0" : "aura_root_x";
     gfx::AcceleratedWidget xwindow =
         root_windows[i]->GetHost()->GetAcceleratedWidget();
     XStoreName(gfx::GetXDisplay(), xwindow, name.c_str());
   }
 #endif
 }
 
 }  // namespace ash