Re-implement overscan & Implement Display Rotation

ui/aura/root_window_host_linux.h

Index: ui/aura/root_window_host_linux.h
diff --git a/ui/aura/root_window_host_linux.h b/ui/aura/root_window_host_linux.h
index 0be11db65ae31fe6adde32f285ee7cac519db0ac..3616922f1da36f42a739751b3b5827a7f1272e26 100644
--- a/ui/aura/root_window_host_linux.h
+++ b/ui/aura/root_window_host_linux.h
@@ -18,6 +18,7 @@
 #include "ui/aura/root_window_host.h"
 #include "ui/base/x/x11_atom_cache.h"
 #include "ui/base/x/x11_util.h"
+#include "ui/gfx/insets.h"
 #include "ui/gfx/rect.h"
 
 namespace ui {
@@ -49,6 +50,8 @@ class RootWindowHostLinux : public RootWindowHost,
   virtual void ToggleFullScreen() OVERRIDE;
   virtual gfx::Rect GetBounds() const OVERRIDE;
   virtual void SetBounds(const gfx::Rect& bounds) OVERRIDE;
+  virtual gfx::Insets GetInsets() const OVERRIDE;
+  virtual void SetInsets(const gfx::Insets& insets) OVERRIDE;
   virtual gfx::Point GetLocationOnNativeScreen() const OVERRIDE;
   virtual void SetCapture() OVERRIDE;
   virtual void ReleaseCapture() OVERRIDE;
@@ -120,6 +123,9 @@ class RootWindowHostLinux : public RootWindowHost,
   // The bounds of |xwindow_|.
   gfx::Rect bounds_;
 
+  // The insets that specifies the effective area within the |window_|.
+  gfx::Insets insets_;
+
   // The bounds of |x_root_window_|.
   gfx::Rect x_root_bounds_;