Early-out from the prepaint tree walk

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

Index: third_party/WebKit/Source/core/paint/PaintPropertyTreeBuilderTest.cpp
diff --git a/third_party/WebKit/Source/core/paint/PaintPropertyTreeBuilderTest.cpp b/third_party/WebKit/Source/core/paint/PaintPropertyTreeBuilderTest.cpp
index 6ab437c8e08209c143276029ff0081767271a465..05367fefcec32804fe233dd27353e287e4a50fe7 100644
--- a/third_party/WebKit/Source/core/paint/PaintPropertyTreeBuilderTest.cpp
+++ b/third_party/WebKit/Source/core/paint/PaintPropertyTreeBuilderTest.cpp
@@ -2929,6 +2929,16 @@ TEST_P(PaintPropertyTreeBuilderTest, DescendantNeedsUpdateAcrossFrames) {
   EXPECT_FALSE(divWithTransform->descendantNeedsPaintPropertyUpdate());
   EXPECT_FALSE(childLayoutView->descendantNeedsPaintPropertyUpdate());
   EXPECT_FALSE(innerDivWithTransform->descendantNeedsPaintPropertyUpdate());
+
+  // A child frame marked as needing a paint property update should not be
+  // skipped if the owning layout tree does not need an update.
+  FrameView* childFrameView = childDocument().view();
+  childFrameView->setNeedsPaintPropertyUpdate();
+  EXPECT_TRUE(document().layoutView()->descendantNeedsPaintPropertyUpdate());
+  frameView->updateAllLifecyclePhases();
+  EXPECT_FALSE(document().layoutView()->descendantNeedsPaintPropertyUpdate());
+  EXPECT_FALSE(frameView->needsPaintPropertyUpdate());
+  EXPECT_FALSE(childFrameView->needsPaintPropertyUpdate());
 }
 
 TEST_P(PaintPropertyTreeBuilderTest, UpdatingFrameViewContentClip) {