Blink caret only if selection has focus.

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 8a63733d2cef973bdf7a5bf23060356bc7f45792..d41368759f3f54c323264ed63a8d62099c1bcf39 100644
--- a/third_party/WebKit/Source/core/editing/FrameCaret.cpp
+++ b/third_party/WebKit/Source/core/editing/FrameCaret.cpp
@@ -28,6 +28,7 @@
 #include "core/dom/TaskRunnerHelper.h"
 #include "core/editing/CaretDisplayItemClient.h"
 #include "core/editing/EditingUtilities.h"
+#include "core/editing/FrameSelection.h"
 #include "core/editing/SelectionEditor.h"
 #include "core/frame/FrameView.h"
 #include "core/frame/LocalFrame.h"
@@ -212,8 +213,7 @@ bool FrameCaret::ShouldBlinkCaret() const {
   if (!focused_element)
     return false;
 
-  return focused_element->IsShadowIncludingInclusiveAncestorOf(
-      CaretPosition().AnchorNode());
+  return frame_->Selection().SelectionHasFocus();

[yosin_UTC9, 2017/05/18 07:30:44]

Yes, this is what I expected.

When |focused_element_| is BODY, this function returns true for caret in
unfocused INPUT.

Hope no layout rest failures...

 }
 
 void FrameCaret::CaretBlinkTimerFired(TimerBase*) {