Start of display management for mus

components/mus/ws/display_manager.h

Index: components/mus/ws/display_manager.h
diff --git a/components/mus/ws/display_manager.h b/components/mus/ws/display_manager.h
index 4cf6e4b93c45eae8bd4018287ed3a0cd8b531d86..be2c3130c57e5d1733f7056a2d5a792e778b2ead 100644
--- a/components/mus/ws/display_manager.h
+++ b/components/mus/ws/display_manager.h
@@ -15,6 +15,7 @@
 #include "base/strings/string16.h"
 #include "base/timer/timer.h"
 #include "build/build_config.h"
+#include "components/mus/public/interfaces/window_manager_constants.mojom.h"
 #include "components/mus/public/interfaces/window_tree.mojom.h"
 #include "components/mus/ws/display_manager_delegate.h"
 #include "mojo/public/cpp/bindings/callback.h"
@@ -54,6 +55,7 @@ class EventDispatcher;
 class ServerWindow;
 
 // DisplayManager is used to connect the root ServerWindow to a display.
+// TODO(sky): rename this given we have a mojom type with the same name now.
 class DisplayManager {
  public:
   virtual ~DisplayManager() {}
@@ -75,6 +77,8 @@ class DisplayManager {
 
   virtual void SetCursorById(int32_t cursor) = 0;
 
+  virtual mojom::Rotation GetRotation() = 0;
+
   virtual const mojom::ViewportMetrics& GetViewportMetrics() = 0;
 
   virtual void UpdateTextInputState(const ui::TextInputState& state) = 0;
@@ -112,6 +116,7 @@ class DefaultDisplayManager : public DisplayManager,
   void SetTitle(const base::string16& title) override;
   void SetCursorById(int32_t cursor) override;
   const mojom::ViewportMetrics& GetViewportMetrics() override;
+  mojom::Rotation GetRotation() override;
   void UpdateTextInputState(const ui::TextInputState& state) override;
   void SetImeVisibility(bool visible) override;
   bool IsFramePending() const override;