Use Position instead of VisiblePosition for SurroundingText.

Source/core/testing/Internals.cpp

Index: Source/core/testing/Internals.cpp
diff --git a/Source/core/testing/Internals.cpp b/Source/core/testing/Internals.cpp
index eb48a0c2f7d3ad6bb64d350b5536b3d8d0067ee8..598b6fa9edbb27c4cf212e3ff209bf0dacf287f7 100644
--- a/Source/core/testing/Internals.cpp
+++ b/Source/core/testing/Internals.cpp
@@ -2339,7 +2339,7 @@ String Internals::textSurroundingNode(Node* node, int x, int y, unsigned long ma
     if (!node)
         return String();
     blink::WebPoint point(x, y);
-    SurroundingText surroundingText(VisiblePosition(node->renderer()->positionForPoint(static_cast<IntPoint>(point))), maxLength);
+    SurroundingText surroundingText(node->renderer()->positionForPoint(static_cast<IntPoint>(point)).position(), maxLength);
     return surroundingText.content();
 }