Update is-valid flag upon resetting input elements.

Source/core/html/HTMLFormControlElement.cpp

Index: Source/core/html/HTMLFormControlElement.cpp
diff --git a/Source/core/html/HTMLFormControlElement.cpp b/Source/core/html/HTMLFormControlElement.cpp
index 03d1912a59322d9cd1a3befbaa851ac12dc7a83d..c90c0d56b2d7fd9e62dca8d3e19cc0d2dd38b474 100644
--- a/Source/core/html/HTMLFormControlElement.cpp
+++ b/Source/core/html/HTMLFormControlElement.cpp
@@ -457,7 +457,7 @@ void HTMLFormControlElement::setNeedsValidityCheck()
     }
     m_isValid = newIsValid;
 
-    // Updates only if this control already has a validtion message.
+    // Updates only if this control already has a validation message.
     if (m_validationMessage && m_validationMessage->isVisible()) {
         // Calls updateVisibleValidationMessage() even if m_isValid is not
         // changed because a validation message can be chagned.