Remove stale spellcheck markers at idle time

third_party/WebKit/Source/core/editing/spellcheck/SpellChecker.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
  *
  * 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
@@ skipping 636 matching lines @@
                     detail.length, result.replacement);
         }
         continue;
     }
     NOTREACHED();
   }
 }
 
 void SpellChecker::updateMarkersForWordsAffectedByEditing(
     bool doNotRemoveIfSelectionAtWordBoundary) {
+  if (RuntimeEnabledFeatures::idleTimeSpellCheckingEnabled())

[yosin_UTC9, 2017/04/05 01:52:35]

Nice! (^_^)b

+    return;
+
   DCHECK(frame().selection().isAvailable());
   TRACE_EVENT0("blink", "SpellChecker::updateMarkersForWordsAffectedByEditing");
   // TODO(editing-dev): We should hoist
   // updateStyleAndLayoutIgnorePendingStylesheets to caller. See
   // http://crbug.com/590369 for more details.
   frame().document()->updateStyleAndLayoutIgnorePendingStylesheets();
   if (!isSpellCheckingEnabledFor(
           frame().selection().computeVisibleSelectionInDOMTree()))
     return;
 
@@ skipping 509 matching lines @@
       if (!input.isFocusedElementInDocument())
         return false;
     }
   }
   HTMLElement* element =
       Traversal<HTMLElement>::firstAncestorOrSelf(*position.anchorNode());
   return element && element->isSpellCheckingEnabled();
 }
 
 }  // namespace blink