Minor revision to ContainerNode::GetUpperLeftCorner

Bug: 771398
Change-Id: Ibe4053be6d8b35e351e71b2e7be28e47ef41d472
Reviewed-on: https://chromium-review.googlesource.com/776406
Commit-Queue: Xiaocheng Hu <xiaochengh@chromium.org>
Reviewed-by: Koji Ishii <kojii@chromium.org>
Cr-Commit-Position: refs/heads/master@{#517529}

third_party/WebKit/Source/core/dom/ContainerNode.cpp

@@ -1040,10 +1040,9 @@ bool ContainerNode::GetUpperLeftCorner(FloatPoint& point) const {
     }
 
     if (o->IsAtomicInlineLevel()) {
-      point = FloatPoint();
       DCHECK(o->IsBox());
       LayoutBox* box = ToLayoutBox(o);
-      point.MoveBy(box->Location());
+      point = FloatPoint(box->Location());
       point = o->Container()->LocalToAbsolute(point, kUseTransforms);
       return true;
     }