Auto rotate on lid rotation changes.

ash/shell.cc

Index: ash/shell.cc
diff --git a/ash/shell.cc b/ash/shell.cc
index 34c386d6a6cd5681f149406a9258c71f010fa24c..d5d086d600c73fae7c40c15b6dc00fbe0fa81652 100644
--- a/ash/shell.cc
+++ b/ash/shell.cc
@@ -11,6 +11,7 @@
 #include "ash/accelerators/accelerator_filter.h"
 #include "ash/accelerators/focus_manager_factory.h"
 #include "ash/accelerators/nested_dispatcher_controller.h"
+#include "ash/accelerometer/accelerometer_controller.h"
 #include "ash/ash_switches.h"
 #include "ash/autoclick/autoclick_controller.h"
 #include "ash/desktop_background/desktop_background_controller.h"
@@ -606,6 +607,7 @@ Shell::Shell(ShellDelegate* delegate)
       delegate_(delegate),
       window_positioner_(new WindowPositioner),
       activation_client_(NULL),
+      accelerometer_controller_(new AccelerometerController()),
 #if defined(OS_CHROMEOS)
       output_configurator_(new ui::OutputConfigurator()),
 #endif  // defined(OS_CHROMEOS)
@@ -617,6 +619,7 @@ Shell::Shell(ShellDelegate* delegate)
   DCHECK(delegate_.get());
   gpu_support_.reset(delegate_->CreateGPUSupport());
   display_manager_.reset(new internal::DisplayManager);
+  accelerometer_controller_->AddObserver(display_manager_.get());
   display_controller_.reset(new DisplayController);
 #if defined(OS_CHROMEOS) && defined(USE_X11)
   user_metrics_recorder_.reset(new UserMetricsRecorder);
@@ -752,6 +755,7 @@ Shell::~Shell() {
   // This also deletes all RootWindows. Note that we invoke Shutdown() on
   // DisplayController before resetting |display_controller_|, since destruction
   // of its owned RootWindowControllers relies on the value.
+  accelerometer_controller_->RemoveObserver(display_manager_.get());
   display_manager_->CreateScreenForShutdown();
   display_controller_->Shutdown();
   display_controller_.reset();