Implement High Contrast mode for Chrome OS

ash/shell.cc

Index: ash/shell.cc
diff --git a/ash/shell.cc b/ash/shell.cc
index bc8829a1fa9de4936c7361af2d090eb71d965a84..a102cc04234bba6ccb92feca6fcd5bb65d11fac3 100644
--- a/ash/shell.cc
+++ b/ash/shell.cc
@@ -13,6 +13,7 @@
 #include "ash/desktop_background/desktop_background_view.h"
 #include "ash/drag_drop/drag_drop_controller.h"
 #include "ash/focus_cycler.h"
+#include "ash/high_contrast/high_contrast_controller.h"
 #include "ash/ime/input_method_event_filter.h"
 #include "ash/launcher/launcher.h"
 #include "ash/magnifier/magnification_controller.h"
@@ -735,12 +736,15 @@ void Shell::Init() {
 
   drag_drop_controller_.reset(new internal::DragDropController);
   magnification_controller_.reset(new internal::MagnificationController);
+  high_contrast_controller_.reset(new internal::HighContrastController);
   power_button_controller_.reset(new PowerButtonController);
   AddShellObserver(power_button_controller_.get());
   video_detector_.reset(new VideoDetector);
   window_cycle_controller_.reset(new WindowCycleController);
   monitor_controller_.reset(new internal::MonitorController);
   screen_dimmer_.reset(new internal::ScreenDimmer);
+
+  high_contrast_controller_->SetEnable(delegate_->IsHighContrastEnabled());
 }
 
 aura::Window* Shell::GetContainer(int container_id) {