Move DIP translation from ui/aura to ui/compositor

ui/aura/window.h

Index: ui/aura/window.h
diff --git a/ui/aura/window.h b/ui/aura/window.h
index c8e46a640f505d7a1d04fc1ddd3ba2464fe2d8de..e3bb2714d1f27a29fdbe457086a5fb8d750817a7 100644
--- a/ui/aura/window.h
+++ b/ui/aura/window.h
@@ -112,8 +112,7 @@ class AURA_EXPORT Window : public ui::LayerDelegate,
 
   WindowDelegate* delegate() { return delegate_; }
 
-  // TODO(oshima): Rename this to GetBounds().
-  gfx::Rect bounds() const;
+  const gfx::Rect& bounds() const;
 
   Window* parent() { return parent_; }
   const Window* parent() const { return parent_; }
@@ -144,9 +143,6 @@ class AURA_EXPORT Window : public ui::LayerDelegate,
   // support.
   gfx::Rect GetBoundsInRootWindow() const;
 
-  // Returns the bounds in pixel coordinates.
-  const gfx::Rect& GetBoundsInPixel() const;
-
   virtual void SetTransform(const ui::Transform& transform);
 
   // Assigns a LayoutManager to size and place child windows.