Moving input device hotplug event processing outside of ui/display

ash/display/display_change_observer_chromeos.h

Index: ash/display/display_change_observer_chromeos.h
diff --git a/ash/display/display_change_observer_chromeos.h b/ash/display/display_change_observer_chromeos.h
index 1e6521ff7816bf34e089e81015c241af384c7924..a07ba365e4956208e2e353b35667e404fb51453e 100644
--- a/ash/display/display_change_observer_chromeos.h
+++ b/ash/display/display_change_observer_chromeos.h
@@ -9,6 +9,7 @@
 #include "ash/shell_observer.h"
 #include "base/basictypes.h"
 #include "ui/display/chromeos/display_configurator.h"
+#include "ui/events/input_device_event_observer.h"
 
 namespace ash {
 
@@ -18,6 +19,7 @@ struct DisplayMode;
 // update DisplayManagers.
 class DisplayChangeObserver : public ui::DisplayConfigurator::StateController,
                               public ui::DisplayConfigurator::Observer,
+                              public ui::InputDeviceEventObserver,

[dnicoara, 2014/06/13 18:47:58]

I originally wanted to put this in DisplayManager, but that proved to be harder
than expected due to how the state in updated within DisplayManager.

                               public ShellObserver {
  public:
   // Returns the resolution list.
@@ -37,6 +39,9 @@ class DisplayChangeObserver : public ui::DisplayConfigurator::StateController,
   virtual void OnDisplayModeChanged(
       const ui::DisplayConfigurator::DisplayStateList& outputs) OVERRIDE;
 
+  // ui::InputDeviceEventObserver override:
+  virtual void OnInputDeviceConfigurationChanged() OVERRIDE;
+
   // Overriden from ShellObserver:
   virtual void OnAppTerminating() OVERRIDE;