Skip paint chunks with effectively invisible opacity.

third_party/WebKit/Source/core/paint/PaintLayerPainter.cpp

Index: third_party/WebKit/Source/core/paint/PaintLayerPainter.cpp
diff --git a/third_party/WebKit/Source/core/paint/PaintLayerPainter.cpp b/third_party/WebKit/Source/core/paint/PaintLayerPainter.cpp
index 2d0b917413a35611db9079fff8995dca642b36f9..1e25408ed4879f9f413b4354bf79d3a3c5ea9586 100644
--- a/third_party/WebKit/Source/core/paint/PaintLayerPainter.cpp
+++ b/third_party/WebKit/Source/core/paint/PaintLayerPainter.cpp
@@ -77,11 +77,9 @@ bool PaintLayerPainter::PaintedOutputInvisible(
     return false;
 
   if (RuntimeEnabledFeatures::slimmingPaintV2Enabled()) {
-    if (layout_object.StyleRef().Opacity())
-      return false;
-
+    const ObjectPaintProperties* properties = layout_object.PaintProperties();
     const EffectPaintPropertyNode* effect =
-        layout_object.PaintProperties()->Effect();
+        properties ? properties->Effect() : nullptr;
     if (effect && effect->RequiresCompositingForAnimation()) {
       return false;
     }
@@ -93,11 +91,9 @@ bool PaintLayerPainter::PaintedOutputInvisible(
   // not visible.
   static const float kMinimumVisibleOpacity = 0.0004f;
   if (paint_layer_.PaintsWithTransparency(
-          painting_info.GetGlobalPaintFlags())) {
-    if (layout_object.StyleRef().Opacity() < kMinimumVisibleOpacity) {
-      return true;
-    }
-  }
+          painting_info.GetGlobalPaintFlags()) &&
+      layout_object.StyleRef().Opacity() < kMinimumVisibleOpacity)
+    return true;
   return false;
 }