Generate focusin for input type=date/time when selected by tab

Source/core/html/HTMLTextFormControlElement.h

Index: Source/core/html/HTMLTextFormControlElement.h
diff --git a/Source/core/html/HTMLTextFormControlElement.h b/Source/core/html/HTMLTextFormControlElement.h
index e27eabcf5a3ad2b1c1a7b4c4d34982ab353d83d2..bc130b0ff2a64b9320ffffd23df44b121aaefee0 100644
--- a/Source/core/html/HTMLTextFormControlElement.h
+++ b/Source/core/html/HTMLTextFormControlElement.h
@@ -133,6 +133,7 @@ private:
 
     virtual void dispatchFocusEvent(Element* oldFocusedElement, FocusType) OVERRIDE FINAL;
     virtual void dispatchBlurEvent(Element* newFocusedElement) OVERRIDE FINAL;
+    virtual void dispatchFocusInEvent(const AtomicString& eventType, Element* oldFocusedElement, FocusType) OVERRIDE FINAL;
 
     // Returns true if user-editable value is empty. Used to check placeholder visibility.
     virtual bool isEmptyValue() const = 0;
@@ -142,6 +143,8 @@ private:
     virtual void handleFocusEvent(Element* /* oldFocusedNode */, FocusType) { }
     // Called in dispatchBlurEvent(), after placeholder process, before calling parent's dispatchBlurEvent().
     virtual void handleBlurEvent() { }
+    // Called in dispatchFocusInEvent(), before calling parent's dispatchFocusInEvent().
+    virtual void handleFocusInEvent(Element* /* oldFocusedNode */, FocusType) { }
 
     String m_textAsOfLastFormControlChangeEvent;
     bool m_lastChangeWasUserEdit;