cc : Don't draw animating layers with singular screen space transform

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 2fa97b1e1bdfec6c0561aa2b989d2dc3b5096f7c..dabe56204c378a1dfac0e5957fa392172c91d4d3 100644
--- a/cc/layers/layer_impl.h
+++ b/cc/layers/layer_impl.h
@@ -435,6 +435,13 @@ class CC_EXPORT LayerImpl {
   void set_needs_show_scrollbars(bool yes) { needs_show_scrollbars_ = yes; }
   bool needs_show_scrollbars() { return needs_show_scrollbars_; }
 
+  void set_raster_even_if_not_in_rsll(bool yes) {
+    raster_even_if_not_in_rsll_ = yes;
+  }
+  bool raster_even_if_not_in_rsll() const {
+    return raster_even_if_not_in_rsll_;
+  }
+
  protected:
   LayerImpl(LayerTreeImpl* layer_impl,
             int id,
@@ -554,6 +561,8 @@ class CC_EXPORT LayerImpl {
   // layers) and consumed by LayerTreeImpl::PushPropertiesTo during activation.
   bool needs_show_scrollbars_ : 1;
 
+  bool raster_even_if_not_in_rsll_ : 1;
+
   DISALLOW_COPY_AND_ASSIGN(LayerImpl);
 };