Invalidate caret during paint invalidation

third_party/WebKit/Source/core/frame/LocalFrame.h

Index: third_party/WebKit/Source/core/frame/LocalFrame.h
diff --git a/third_party/WebKit/Source/core/frame/LocalFrame.h b/third_party/WebKit/Source/core/frame/LocalFrame.h
index f6018a4f738d97af9208fa122e57dee1e6008822..b5ea07bd7585129d82cd1dbdd4f0aaf0f657de71 100644
--- a/third_party/WebKit/Source/core/frame/LocalFrame.h
+++ b/third_party/WebKit/Source/core/frame/LocalFrame.h
@@ -152,6 +152,9 @@ class CORE_EXPORT LocalFrame final : public Frame,
   // FIXME: This is a temporary hack to support RemoteFrames, and callers
   // should be updated to avoid storing things on the main frame.
   LocalFrame* localFrameRoot();
+  const LocalFrame* localFrameRoot() const {
+    return const_cast<LocalFrame*>(this)->localFrameRoot();
+  }
 
   // Note that the result of this function should not be cached: a frame is
   // not necessarily detached when it is navigated, so the return value can