Store rotation/ui scale to local state.

ash/shell.cc

Index: ash/shell.cc
diff --git a/ash/shell.cc b/ash/shell.cc
index 27223e1e1425143aeb58f3d049c680e73977fb70..d762132e3bc227a0d5cf4f0dee3c3f8f48eed398 100644
--- a/ash/shell.cc
+++ b/ash/shell.cc
@@ -417,6 +417,7 @@ bool Shell::IsLauncherPerDisplayEnabled() {
 }
 
 void Shell::Init() {
+  delegate_->OnPreInit();
 #if defined(OS_CHROMEOS)
   output_configurator_animation_.reset(
       new internal::OutputConfiguratorAnimation());
@@ -427,6 +428,7 @@ void Shell::Init() {
     // observer gets invoked after the root windows are configured.
     output_configurator_->AddObserver(display_change_observer_.get());
     display_error_observer_.reset(new internal::DisplayErrorObserver());
+    output_configurator_->set_delegate(display_change_observer_.get());
     output_configurator_->AddObserver(display_error_observer_.get());
     display_change_observer_->OnDisplayModeChanged();
   }