Blink handle selection handle visibility

third_party/WebKit/Source/core/frame/FrameView.cpp

 /*
  * Copyright (C) 1998, 1999 Torben Weis <weis@kde.org>
  *                     1999 Lars Knoll <knoll@kde.org>
  *                     1999 Antti Koivisto <koivisto@kde.org>
  *                     2000 Dirk Mueller <mueller@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
  *           (C) 2006 Graham Dennis (graham.dennis@gmail.com)
  *           (C) 2006 Alexey Proskuryakov (ap@nypop.com)
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
@@ skipping 1736 matching lines @@
       layoutViewItem.layer()->setNeedsCompositingInputsUpdate();
   }
 }
 
 bool FrameView::computeCompositedSelection(LocalFrame& frame,
                                            CompositedSelection& selection) {
   if (!frame.view() || frame.view()->shouldThrottleRendering())
     return false;
 
   const VisibleSelection& visibleSelection = frame.selection().selection();
-  if (visibleSelection.isNone())
+  if (visibleSelection.isNone() || !visibleSelection.isHandleVisible())
     return false;
 
   // Non-editable caret selections lack any kind of UI affordance, and
   // needn't be tracked by the client.
   if (visibleSelection.isCaret() && !visibleSelection.isContentEditable())
     return false;
 
   VisiblePosition visibleStart(visibleSelection.visibleStart());
   RenderedPosition renderedStart(visibleStart);
   renderedStart.positionInGraphicsLayerBacking(selection.start, true);
@@ skipping 2802 matching lines @@
 }
 
 bool FrameView::canThrottleRendering() const {
   if (!RuntimeEnabledFeatures::renderingPipelineThrottlingEnabled())
     return false;
   return m_subtreeThrottled ||
          (m_hiddenForThrottling && m_crossOriginForThrottling);
 }
 
 }  // namespace blink