Stop displaying layers with non-invertible transforms.

cc/layers/layer_impl.h

Index: cc/layers/layer_impl.h
diff --git a/cc/layers/layer_impl.h b/cc/layers/layer_impl.h
index f412fdbae66138c26bd5147be5b49535ded7fa9e..160ebfa1ebe68cfe32f58ca5092bfeba31d9e4ba 100644
--- a/cc/layers/layer_impl.h
+++ b/cc/layers/layer_impl.h
@@ -440,6 +440,9 @@ class CC_EXPORT LayerImpl : public LayerAnimationValueObserver,
   const gfx::Transform& transform() const { return transform_; }
   bool TransformIsAnimating() const;
   bool TransformIsAnimatingOnImplOnly() const;
+  void SetTransformAndInvertibility(const gfx::Transform& transform,
+                                    bool transform_is_invertible);
+  bool transform_is_invertible() const { return transform_is_invertible_; }
 
   // Note this rect is in layer space (not content space).
   void SetUpdateRect(const gfx::RectF& update_rect);
@@ -598,6 +601,9 @@ class CC_EXPORT LayerImpl : public LayerAnimationValueObserver,
   bool hide_layer_and_subtree_ : 1;
   bool force_render_surface_ : 1;
 
+  // Prevent calculating transform_'s invertibility too frequently.

[ajuma, 2014/03/28 18:49:07]

"Cache transform_'s invertibility to avoid needing to recompute it"?

[avallee, 2014/04/15 18:53:25]

Done.

+  bool transform_is_invertible_ : 1;
+
   // Set for the layer that other layers are fixed to.
   bool is_container_for_fixed_position_layers_ : 1;
   bool is_3d_sorted_ : 1;