INPUT/TEXTAREA elements: Dispatch 'change' event even if a user-edit value is overwritten by JS

third_party/WebKit/Source/core/html/HTMLTextAreaElement.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2010 Apple Inc. All rights
  * reserved.
  *           (C) 2006 Alexey Proskuryakov (ap@nypop.com)
  * Copyright (C) 2007 Samuel Weinig (sam@webkit.org)
  *
  * This library is free software; you can redistribute it and/or
@@ skipping 417 matching lines @@
                                               StyleChangeReason::ControlValue));
   m_suggestedValue = String();
   setNeedsValidityCheck();
   if (isFinishedParsingChildren()) {
     // Set the caret to the end of the text value except for initialize.
     unsigned endOfString = m_value.length();
     setSelectionRange(endOfString, endOfString);
   }
 
   notifyFormStateChanged();
-  if (eventBehavior == DispatchNoEvent) {
-    setTextAsOfLastFormControlChangeEvent(normalizedValue);
-  } else {
-    if (eventBehavior == DispatchInputAndChangeEvent)
+  switch (eventBehavior) {
+    case DispatchChangeEvent:
+      dispatchFormControlChangeEvent();
+      break;
+
+    case DispatchInputAndChangeEvent:
       dispatchFormControlInputEvent();
-    dispatchFormControlChangeEvent();
+      dispatchFormControlChangeEvent();
+      break;
+
+    case DispatchNoEvent:
+      // We need to update textAsOfLastFormControlChangeEvent for |value| IDL
+      // setter without focus because input-assist features use setValue("...",
+      // DispatchChangeEvent) without setting focus.
+      if (!isFocused())
+        setTextAsOfLastFormControlChangeEvent(normalizedValue);
+      break;
   }
 }
 
 void HTMLTextAreaElement::setInnerEditorValue(const String& value) {
   HTMLTextFormControlElement::setInnerEditorValue(value);
   m_valueIsUpToDate = true;
 }
 
 String HTMLTextAreaElement::defaultValue() const {
   StringBuilder value;
@@ skipping 228 matching lines @@
 void HTMLTextAreaElement::copyNonAttributePropertiesFromElement(
     const Element& source) {
   const HTMLTextAreaElement& sourceElement =
       static_cast<const HTMLTextAreaElement&>(source);
   setValueCommon(sourceElement.value(), DispatchNoEvent, SetSeletion);
   m_isDirty = sourceElement.m_isDirty;
   HTMLTextFormControlElement::copyNonAttributePropertiesFromElement(source);
 }
 
 }  // namespace blink