INPUT without focus should be considered as spellcheck disabled

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 58 matching lines @@
 }
 
 bool isPositionInTextArea(const Position& position) {
   TextControlElement* textControl = enclosingTextControl(position);
   return isHTMLTextAreaElement(textControl);
 }
 
 static bool isSpellCheckingEnabledFor(const Position& position) {
   if (position.isNull())
     return false;
-  // TODO(tkent): The following password type check should be done in
-  // HTMLElement::spellcheck(). crbug.com/371567
   if (TextControlElement* textControl = enclosingTextControl(position)) {
-    if (isHTMLInputElement(textControl) &&
-        toHTMLInputElement(textControl)->type() == InputTypeNames::password)
-      return false;
+    if (isHTMLInputElement(textControl)) {
+      HTMLInputElement& input = toHTMLInputElement(*textControl);
+      // TODO(tkent): The following password type check should be done in
+      // HTMLElement::spellcheck(). crbug.com/371567
+      if (input.type() == InputTypeNames::password)
+        return false;
+      if (!input.isFocusedElementInDocument())
+        return false;
+    }
   }
   if (HTMLElement* element =
           Traversal<HTMLElement>::firstAncestorOrSelf(*position.anchorNode())) {
     if (element->isSpellCheckingEnabled())
       return true;
   }
   return false;
 }
 
 static bool isSpellCheckingEnabledFor(const VisibleSelection& selection) {
@@ skipping 1135 matching lines @@
         startOfNextParagraph(createVisiblePosition(paragraphEnd));
     paragraphStart = newParagraphStart.toParentAnchoredPosition();
     paragraphEnd = endOfParagraph(newParagraphStart).toParentAnchoredPosition();
     firstIteration = false;
     totalLengthProcessed += currentLength;
   }
   return std::make_pair(firstFoundItem, firstFoundOffset);
 }
 
 }  // namespace blink