cc: Allow transparent layers with background filters to render

cc/trees/draw_property_utils.cc

Index: cc/trees/draw_property_utils.cc
diff --git a/cc/trees/draw_property_utils.cc b/cc/trees/draw_property_utils.cc
index a44feffc47e6141f87dfda644fe420053a367cb4..17152953e58812d682c48a50c2d3a88f78d5ab13 100644
--- a/cc/trees/draw_property_utils.cc
+++ b/cc/trees/draw_property_utils.cc
@@ -270,6 +270,11 @@ static inline bool SubtreeShouldBeSkipped(LayerImpl* layer,
       layer->HasPotentiallyRunningOpacityAnimation())
     return false;
 
+  // If layer has a background filter, don't skip the layer, even it the
+  // opacity is 0.
+  if (!layer->background_filters().IsEmpty())
+    return false;
+
   // The opacity of a layer always applies to its children (either implicitly
   // via a render surface or explicitly if the parent preserves 3D), so the
   // entire subtree can be skipped if this layer is fully transparent.
@@ -298,6 +303,11 @@ static inline bool SubtreeShouldBeSkipped(Layer* layer,
       IsSurfaceBackFaceVisible(layer, tree))
     return true;
 
+  // If layer has a background filter, don't skip the layer, even it the
+  // opacity is 0.
+  if (!layer->background_filters().IsEmpty())
+    return false;
+
   // If the opacity is being animated then the opacity on the main thread is
   // unreliable (since the impl thread may be using a different opacity), so it
   // should not be trusted.