LayoutMenuList::ControlClipRect may depend on size of children

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

Index: third_party/WebKit/Source/core/paint/PaintPropertyTreeUpdateTests.cpp
diff --git a/third_party/WebKit/Source/core/paint/PaintPropertyTreeUpdateTests.cpp b/third_party/WebKit/Source/core/paint/PaintPropertyTreeUpdateTests.cpp
index 9fdb15784eac0ec38aeca66984bdacdcc310d5f1..6f3548afb875f1d328e8d5e7af6c72c89d9b47cd 100644
--- a/third_party/WebKit/Source/core/paint/PaintPropertyTreeUpdateTests.cpp
+++ b/third_party/WebKit/Source/core/paint/PaintPropertyTreeUpdateTests.cpp
@@ -3,6 +3,7 @@
 // found in the LICENSE file.
 
 #include "core/html/HTMLIFrameElement.h"
+#include "core/html/HTMLSelectElement.h"
 #include "core/paint/PaintPropertyTreeBuilderTest.h"
 #include "core/paint/PaintPropertyTreePrinter.h"
 
@@ -751,4 +752,20 @@ TEST_P(PaintPropertyTreeUpdateTest, Preserve3DChange) {
   EXPECT_FALSE(transform->FlattensInheritedTransform());
 }
 
+TEST_P(PaintPropertyTreeUpdateTest, MenuListControlClipChange) {
+  SetBodyInnerHTML(
+      "<select id='select' style='white-space: normal'>"
+      "  <option></option>"
+      "  <option>bar</option>"
+      "</select>");
+
+  auto* select = GetLayoutObjectByElementId("select");
+  EXPECT_NE(nullptr, select->PaintProperties()->OverflowClip());
+
+  // Should not assert in FindPropertiesNeedingUpdate.
+  toHTMLSelectElement(select->GetNode())->setSelectedIndex(1);
+  GetDocument().View()->UpdateAllLifecyclePhases();
+  EXPECT_NE(nullptr, select->PaintProperties()->OverflowClip());
+}
+
 }  // namespace blink