Auto rotate on lid rotation changes.

ash/display/display_manager.h

Index: ash/display/display_manager.h
diff --git a/ash/display/display_manager.h b/ash/display/display_manager.h
index c67252498dab9f93b4ab9ebfaccb324d9a1fadd1..878e4bac3c5198711bf60fa25ee6eed454e6d0c3 100644
--- a/ash/display/display_manager.h
+++ b/ash/display/display_manager.h
@@ -8,6 +8,7 @@
 #include <string>
 #include <vector>
 
+#include "ash/accelerometer/accelerometer_observer.h"
 #include "ash/ash_export.h"
 #include "ash/display/display_info.h"
 #include "ash/display/display_layout.h"
@@ -25,6 +26,7 @@ class Display;
 class Insets;
 class Rect;
 class Screen;
+class Vector3dF;
 }
 
 namespace ash {
@@ -43,11 +45,11 @@ class DisplayLayoutStore;
 // and notifies observers when configuration changes.
 //
 // TODO(oshima): Make this non internal.
-class ASH_EXPORT DisplayManager
+class ASH_EXPORT DisplayManager :
 #if defined(OS_CHROMEOS)
-    : public ui::OutputConfigurator::SoftwareMirroringController
+      public ui::OutputConfigurator::SoftwareMirroringController,
 #endif
-      {
+      public ash::AccelerometerObserver {
  public:
   class ASH_EXPORT Delegate {
    public:
@@ -279,6 +281,10 @@ class ASH_EXPORT DisplayManager
   // Create a screen instance to be used during shutdown.
   void CreateScreenForShutdown() const;
 
+  // ash::AccelerometerObserver:
+  virtual void OnAccelerometerUpdated(const gfx::Vector3dF& base,
+                                      const gfx::Vector3dF& lid) OVERRIDE;

[oshima, 2014/04/01 00:57:03]

Hmm, I don't think this should belong here. (I should have DPES here. it's my
fault)

This class is pretty much independent of most of ash classes and want to keep it
that way.

[flackr, 2014/04/01 01:46:31]

Okay, so something else to observe accelerometer updates and call into
DisplayManager?

[oshima, 2014/04/01 14:52:50]

sgtm. I don't have strong preference as to where/which class. May be in a class
that controls TouchView mode?

+
 private:
   FRIEND_TEST_ALL_PREFIXES(ExtendedDesktopTest, ConvertPoint);
   FRIEND_TEST_ALL_PREFIXES(DisplayManagerTest, TestNativeDisplaysChanged);