Support for drawing a debug border around animated layers

cc/layers/layer.h

Index: cc/layers/layer.h
diff --git a/cc/layers/layer.h b/cc/layers/layer.h
index 9af3dea7c7de4f3165334cc6da8e3bfbe36ce105..cada733c99cc29133a0f9691c852a698afb35aa7 100644
--- a/cc/layers/layer.h
+++ b/cc/layers/layer.h
@@ -374,6 +374,8 @@ class CC_EXPORT Layer : public base::RefCounted<Layer>,
   float contents_scale_y() const { return draw_properties_.contents_scale_y; }
   gfx::Size content_bounds() const { return draw_properties_.content_bounds; }
 
+  bool GetAnimationBounds(gfx::BoxF* out) const { return false; }

[Ian Vollick, 2013/11/28 00:05:12]

I don't think this will be necessary. Ultimately, we'll only be asking for the
animation bounds of LayerImpls, right?

[avallee, 2013/11/28 00:31:08]

It's not. I forgot to delete this in the CL here.

+
   virtual void CalculateContentsScale(float ideal_contents_scale,
                                       float device_scale_factor,
                                       float page_scale_factor,