Rotate screen in response to accelerator or device orientation sensors.

athena/screen/screen_manager_impl.cc

Index: athena/screen/screen_manager_impl.cc
diff --git a/athena/screen/screen_manager_impl.cc b/athena/screen/screen_manager_impl.cc
index 8522acfc7acd30404c8b2ce8aa0d88fad5963769..b04e7e7ad49dab52c80954866dc50ce7d1cf9608 100644
--- a/athena/screen/screen_manager_impl.cc
+++ b/athena/screen/screen_manager_impl.cc
@@ -14,10 +14,12 @@
 #include "ui/aura/client/screen_position_client.h"
 #include "ui/aura/client/window_tree_client.h"
 #include "ui/aura/layout_manager.h"
+#include "ui/aura/test/test_screen.h"
 #include "ui/aura/window.h"
 #include "ui/aura/window_property.h"
 #include "ui/aura/window_targeter.h"
 #include "ui/aura/window_tree_host.h"
+#include "ui/gfx/screen.h"
 #include "ui/wm/core/base_focus_rules.h"
 #include "ui/wm/core/capture_controller.h"
 
@@ -199,9 +201,12 @@ class ScreenManagerImpl : public ScreenManager {
   virtual aura::Window* CreateContainer(const ContainerParams& params) OVERRIDE;
   virtual aura::Window* GetContext() OVERRIDE { return root_window_; }
   virtual void SetBackgroundImage(const gfx::ImageSkia& image) OVERRIDE;
+  virtual gfx::Display::Rotation GetRotation() OVERRIDE;
+  virtual void SetRotation(gfx::Display::Rotation rotation) OVERRIDE;
 
   aura::Window* root_window_;
   aura::Window* background_window_;
+  gfx::Display::Rotation rotation_;
 
   scoped_ptr<BackgroundController> background_controller_;
   scoped_ptr<aura::client::WindowTreeClient> window_tree_client_;
@@ -213,7 +218,8 @@ class ScreenManagerImpl : public ScreenManager {
 };
 
 ScreenManagerImpl::ScreenManagerImpl(aura::Window* root_window)
-    : root_window_(root_window) {
+    : root_window_(root_window),
+      rotation_(gfx::Display::ROTATE_0) {
   DCHECK(root_window_);
   DCHECK(!instance);
   instance = this;
@@ -322,6 +328,21 @@ void ScreenManagerImpl::SetBackgroundImage(const gfx::ImageSkia& image) {
   background_controller_->SetImage(image);
 }
 
+gfx::Display::Rotation ScreenManagerImpl::GetRotation() {
+  return rotation_;
+}
+
+void ScreenManagerImpl::SetRotation(gfx::Display::Rotation rotation) {
+  if (rotation == rotation_)
+    return;
+
+  rotation_ = rotation;
+  // TODO(flackr): Use display manager to update display rotation:
+  // http://crbug.com/401044.
+  static_cast<aura::TestScreen*>(gfx::Screen::GetNativeScreen())->
+      SetDisplayRotation(rotation);
+}
+
 }  // namespace
 
 ScreenManager::ContainerParams::ContainerParams(const std::string& n,