Changes ownership of ScreenDimmer

chrome/browser/chromeos/dbus/chrome_display_power_service_provider_delegate.cc

Index: chrome/browser/chromeos/dbus/chrome_display_power_service_provider_delegate.cc
diff --git a/chrome/browser/chromeos/dbus/chrome_display_power_service_provider_delegate.cc b/chrome/browser/chromeos/dbus/chrome_display_power_service_provider_delegate.cc
index e5badf7c30ea6a0e4b8d64d82330409e86933fb1..1dcf74411703e927f5abed40c0b66b4348ec2752 100644
--- a/chrome/browser/chromeos/dbus/chrome_display_power_service_provider_delegate.cc
+++ b/chrome/browser/chromeos/dbus/chrome_display_power_service_provider_delegate.cc
@@ -6,6 +6,7 @@
 
 #include "ash/shell.h"
 #include "ash/wm/screen_dimmer.h"
+#include "base/memory/ptr_util.h"
 #include "ui/base/user_activity/user_activity_detector.h"
 #include "ui/display/chromeos/display_configurator.h"
 
@@ -33,7 +34,11 @@ void ChromeDisplayPowerServiceProviderDelegate::SetDisplayPower(
 }
 
 void ChromeDisplayPowerServiceProviderDelegate::SetDimming(bool dimmed) {
-  ash::ScreenDimmer::GetForRoot()->SetDimming(dimmed);
+  if (!screen_dimmer_) {
+    screen_dimmer_ =
+        base::MakeUnique<ash::ScreenDimmer>(ash::ScreenDimmer::Container::ROOT);
+  }
+  screen_dimmer_->SetDimming(dimmed);
 }
 
 }  // namespace chromeos