Revert 138212 - Implement High Contrast mode for Chrome OS.

ash/shell.h

Index: ash/shell.h
===================================================================
--- ash/shell.h	(revision 138238)
+++ ash/shell.h	(working copy)
@@ -53,7 +53,6 @@
 
 class AcceleratorController;
 class DesktopBackgroundController;
-class HighContrastController;
 class Launcher;
 class NestedDispatcherController;
 class PowerButtonController;
@@ -238,14 +237,9 @@
     return user_wallpaper_delegate_.get();
   }
 
-  HighContrastController* high_contrast_controller() {
-    return high_contrast_controller_.get();
-  }
-
   internal::MagnificationController* magnification_controller() {
     return magnification_controller_.get();
   }
-
   internal::ScreenDimmer* screen_dimmer() {
     return screen_dimmer_.get();
   }
@@ -354,7 +348,6 @@
   scoped_ptr<internal::FocusCycler> focus_cycler_;
   scoped_ptr<internal::EventClientImpl> event_client_;
   scoped_ptr<internal::MonitorController> monitor_controller_;
-  scoped_ptr<HighContrastController> high_contrast_controller_;
   scoped_ptr<internal::MagnificationController> magnification_controller_;
   scoped_ptr<internal::ScreenDimmer> screen_dimmer_;