Fix mismatched nullptr check for caret paint invalidation.

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

Index: third_party/WebKit/Source/core/editing/FrameCaret.cpp
diff --git a/third_party/WebKit/Source/core/editing/FrameCaret.cpp b/third_party/WebKit/Source/core/editing/FrameCaret.cpp
index 1246270df9b9f3987582294ea0e57469fe888a13..1a65d873c38e59ed34523d1164bfaf41cb6c35cd 100644
--- a/third_party/WebKit/Source/core/editing/FrameCaret.cpp
+++ b/third_party/WebKit/Source/core/editing/FrameCaret.cpp
@@ -187,11 +187,12 @@ void FrameCaret::invalidateCaretRect(bool forceInvalidation) {
       m_caretVisibility == m_previousCaretVisibility)
     return;
 
-  if (m_previousCaretNode && shouldRepaintCaret(*m_previousCaretAnchorNode)) {
+  if (m_previousCaretAnchorNode &&
+      shouldRepaintCaret(*m_previousCaretAnchorNode)) {
     invalidateLocalCaretRect(m_previousCaretAnchorNode.get(),
                              m_previousCaretRect);
   }
-  if (newNode && shouldRepaintCaret(*newAnchorNode))
+  if (newAnchorNode && shouldRepaintCaret(*newAnchorNode))
     invalidateLocalCaretRect(newAnchorNode, newRect);
   m_previousCaretNode = newNode;
   m_previousCaretAnchorNode = newAnchorNode;