Blink caret only if selection has focus.

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

 /*
  * Copyright (C) 2004, 2008, 2009, 2010 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 10 matching lines @@
  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "core/editing/FrameCaret.h"
 
 #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"
 #include "core/frame/Settings.h"
 #include "core/html/TextControlElement.h"
 #include "core/layout/LayoutBlock.h"
 #include "core/layout/LayoutTheme.h"
 #include "core/layout/api/LayoutPartItem.h"
 #include "core/page/Page.h"
 #include "public/platform/WebTraceLocation.h"
@@ skipping 164 matching lines @@
     return false;
 
   Element* root = RootEditableElementOf(CaretPosition().GetPosition());
   if (!root)
     return false;
 
   Element* focused_element = root->GetDocument().FocusedElement();
   if (!focused_element)
     return false;
 
-  return focused_element->IsShadowIncludingInclusiveAncestorOf(
-      CaretPosition().AnchorNode());
+  return frame_->Selection().SelectionHasFocus();
 }
 
 void FrameCaret::CaretBlinkTimerFired(TimerBase*) {
   DCHECK_EQ(caret_visibility_, CaretVisibility::kVisible);
   if (IsCaretBlinkingSuspended() && should_paint_caret_)
     return;
   should_paint_caret_ = !should_paint_caret_;
   ScheduleVisualUpdateForPaintInvalidationIfNeeded();
 }
 
 void FrameCaret::ScheduleVisualUpdateForPaintInvalidationIfNeeded() {
   if (FrameView* frame_view = frame_->View())
     frame_view->ScheduleVisualUpdateForPaintInvalidationIfNeeded();
 }
 
 void FrameCaret::RecreateCaretBlinkTimerForTesting(
     RefPtr<WebTaskRunner> task_runner) {
   caret_blink_timer_.reset(new TaskRunnerTimer<FrameCaret>(
       std::move(task_runner), this, &FrameCaret::CaretBlinkTimerFired));
 }
 
 }  // namespace blink