Remove a redundant layout update from DragCaret.cpp

third_party/WebKit/Source/core/editing/DragCaret.cpp

Index: third_party/WebKit/Source/core/editing/DragCaret.cpp
diff --git a/third_party/WebKit/Source/core/editing/DragCaret.cpp b/third_party/WebKit/Source/core/editing/DragCaret.cpp
index 60636c51dcc60fff78d60c86d8296ce2b35554d7..e7aeb22365f0151cfc4cf6d3f1d3c19ca564193c 100644
--- a/third_party/WebKit/Source/core/editing/DragCaret.cpp
+++ b/third_party/WebKit/Source/core/editing/DragCaret.cpp
@@ -72,10 +72,6 @@ void DragCaret::setCaretPosition(const PositionWithAffinity& position) {
     document = &node->document();
     setContext(document);
   }
-  if (!m_position.isNull()) {
-    DCHECK(!m_position.isOrphan());
-    document->updateStyleAndLayoutTree();
-  }
 }
 
 void DragCaret::nodeChildrenWillBeRemoved(ContainerNode& container) {