Move the content-dependent RecreateLayer logic from aura::Window to RWHVA

ui/aura/demo/demo_main.cc

Index: ui/aura/demo/demo_main.cc
diff --git a/ui/aura/demo/demo_main.cc b/ui/aura/demo/demo_main.cc
index b2fd97ee7cbfa09a81a4596a5000e79b55edff0f..4dbf0026358c26b8a5f5de6cacb61b2920bb0242 100644
--- a/ui/aura/demo/demo_main.cc
+++ b/ui/aura/demo/demo_main.cc
@@ -67,9 +67,8 @@ class DemoWindowDelegate : public aura::WindowDelegate {
   virtual void OnWindowTargetVisibilityChanged(bool visible) OVERRIDE {}
   virtual bool HasHitTestMask() const OVERRIDE { return false; }
   virtual void GetHitTestMask(gfx::Path* mask) const OVERRIDE {}
-  virtual scoped_refptr<ui::Texture> CopyTexture() OVERRIDE {
-    return scoped_refptr<ui::Texture>();
-  }
+  virtual void DidRecreateLayer(ui::Layer* old_layer,
+                                ui::Layer* new_layer) OVERRIDE {}
 
  private:
   SkColor color_;