Paint invisible layer content in presence of composited animations.

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

Index: third_party/WebKit/Source/core/paint/PaintPropertyTreeBuilder.cpp
diff --git a/third_party/WebKit/Source/core/paint/PaintPropertyTreeBuilder.cpp b/third_party/WebKit/Source/core/paint/PaintPropertyTreeBuilder.cpp
index 804bd9e5952f157c54a18bd20b961a10572a52e0..f50da41462464dcd2b1bc3cc99af0a812b75d55d 100644
--- a/third_party/WebKit/Source/core/paint/PaintPropertyTreeBuilder.cpp
+++ b/third_party/WebKit/Source/core/paint/PaintPropertyTreeBuilder.cpp
@@ -510,10 +510,11 @@ void PaintPropertyTreeBuilder::updateEffect(
       // We should generate a special clip node to represent this expansion.
     }
 
-    CompositingReasons compositingReasons =
-        CompositingReasonFinder::requiresCompositingForEffectAnimation(style);

[wkorman, 2017/01/26 22:47:56]

This was a bug -- we were assigning the bool result to an int reason var. Now
fixed below.

[wkorman, 2017/01/27 03:53:12]

Added check for this to test case.

-    if (compositingReasons != CompositingReasonNone)
+    CompositingReasons compositingReasons = CompositingReasonNone;
+    if (CompositingReasonFinder::requiresCompositingForEffectAnimation(style)) {
+      compositingReasons = CompositingReasonActiveAnimation;
       effectNodeNeeded = true;
+    }
 
     CompositorElementId compositorElementId =
         (style.hasCurrentOpacityAnimation() ||