Fix LayoutObject::mapToVisibleRectInContainerSpace()

third_party/WebKit/Source/core/layout/LayoutObjectTest.cpp

Index: third_party/WebKit/Source/core/layout/LayoutObjectTest.cpp
diff --git a/third_party/WebKit/Source/core/layout/LayoutObjectTest.cpp b/third_party/WebKit/Source/core/layout/LayoutObjectTest.cpp
index 6afcf09eac39739903251250f7a6a2dd26f23a95..b91d7cb3681b5233ceafa888ce72d657eb9f5840 100644
--- a/third_party/WebKit/Source/core/layout/LayoutObjectTest.cpp
+++ b/third_party/WebKit/Source/core/layout/LayoutObjectTest.cpp
@@ -107,5 +107,21 @@ TEST_F(LayoutObjectTest, ContainingBlockAbsoluteLayoutObjectShouldNotBeNonStatic
     EXPECT_EQ(layoutObject->containingBlock(), bodyLayoutObject);
 }
 
+TEST_F(LayoutObjectTest, MapToVisibleRectInContainerSpace)
+{
+    setBodyInnerHTML(
+        "<div id='container' style='overflow: scroll; will-change: transform; width: 50px; height: 50px'>"
+        "  <span><img style='width: 20px; height: 100px'></span>"
+        "  text text text text text text text"
+        "</div>");
+    LayoutBlock* container = toLayoutBlock(document().getElementById("container")->layoutObject());
+    LayoutText* text = toLayoutText(container->lastChild());
+
+    container->setScrollTop(50);
+    LayoutRect rect(0, 60, 20, 20);
+    text->mapToVisibleRectInContainerSpace(container, rect, nullptr);
+    EXPECT_TRUE(rect == LayoutRect(0, 10, 20, 20));
+}
+
 }