Add RootWindowController

chrome/browser/chromeos/power/screen_dimming_observer.cc

Index: chrome/browser/chromeos/power/screen_dimming_observer.cc
diff --git a/chrome/browser/chromeos/power/screen_dimming_observer.cc b/chrome/browser/chromeos/power/screen_dimming_observer.cc
index 7795760c279ae87c036d9873356edd1b30395874..c1080eb5883300ef4df24d00f712f23fa920e467 100644
--- a/chrome/browser/chromeos/power/screen_dimming_observer.cc
+++ b/chrome/browser/chromeos/power/screen_dimming_observer.cc
@@ -4,6 +4,7 @@
 
 #include "chrome/browser/chromeos/power/screen_dimming_observer.h"
 
+#include "ash/root_window_controller.h"
 #include "ash/shell.h"
 #include "ash/wm/screen_dimmer.h"
 #include "chromeos/dbus/dbus_thread_manager.h"
@@ -19,7 +20,7 @@ ScreenDimmingObserver::~ScreenDimmingObserver() {
 }
 
 void ScreenDimmingObserver::ScreenDimmingRequested(ScreenDimmingState state) {
-  ash::Shell::GetInstance()->screen_dimmer()->SetDimming(
+  ash::Shell::GetPrimaryRootWindowController()->screen_dimmer()->SetDimming(

[oshima, 2012/06/13 00:46:09]

Oops, I was going to define Shell::SetDimming. Please hold.

       state == PowerManagerClient::Observer::SCREEN_DIMMING_IDLE);
 }