Do not dispatch change event when pressing spin button for input type=datetime

Source/core/html/forms/BaseMultipleFieldsDateAndTimeInputType.cpp

Index: Source/core/html/forms/BaseMultipleFieldsDateAndTimeInputType.cpp
diff --git a/Source/core/html/forms/BaseMultipleFieldsDateAndTimeInputType.cpp b/Source/core/html/forms/BaseMultipleFieldsDateAndTimeInputType.cpp
index b1be6db2599347e8fb04120712fc2f6aa1dce33e..5a35bc2c7a42a50e4ac2456bbb1b3ca67cec5eff 100644
--- a/Source/core/html/forms/BaseMultipleFieldsDateAndTimeInputType.cpp
+++ b/Source/core/html/forms/BaseMultipleFieldsDateAndTimeInputType.cpp
@@ -161,6 +161,8 @@ void BaseMultipleFieldsDateAndTimeInputType::didBlurFromControl()
     RefPtr<HTMLInputElement> protector(element());
     // Remove focus ring by CSS "focus" pseudo class.
     element().setFocus(false);
+    if (SpinButtonElement *spinButton = spinButtonElement())
+        spinButton->releaseCapture();
 }
 
 void BaseMultipleFieldsDateAndTimeInputType::didFocusOnControl()
@@ -187,7 +189,6 @@ void BaseMultipleFieldsDateAndTimeInputType::editControlValueChanged()
         input->setValueInternal(newValue, DispatchNoEvent);
         input->setNeedsStyleRecalc(SubtreeStyleChange);
         input->dispatchFormControlInputEvent();
-        input->dispatchFormControlChangeEvent();
     }
     input->notifyFormStateChanged();
     input->updateClearButtonVisibility();
@@ -264,6 +265,7 @@ void BaseMultipleFieldsDateAndTimeInputType::pickerIndicatorChooseValue(const St
     unsigned end;
     if (date.parseDate(value, 0, end) && end == value.length())
         edit->setOnlyYearMonthDay(date);
+    element().dispatchFormControlChangeEvent();
 }
 
 void BaseMultipleFieldsDateAndTimeInputType::pickerIndicatorChooseValue(double value)
@@ -441,6 +443,11 @@ AtomicString BaseMultipleFieldsDateAndTimeInputType::localeIdentifier() const
     return element().computeInheritedLanguage();
 }
 
+void BaseMultipleFieldsDateAndTimeInputType::editControlDidChangeValueByKeyboard()
+{
+    element().dispatchFormControlChangeEvent();
+}
+
 void BaseMultipleFieldsDateAndTimeInputType::minOrMaxAttributeChanged()
 {
     updateView();