Fix behavior of HTMLInputElement.maxLength/minLength getter

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

Index: third_party/WebKit/Source/core/html/HTMLInputElement.cpp
diff --git a/third_party/WebKit/Source/core/html/HTMLInputElement.cpp b/third_party/WebKit/Source/core/html/HTMLInputElement.cpp
index 03cba21d8ca1fabba0b517620be266004b48713b..069b9eb551169471220e70ce8cd18b4cfd988937 100644
--- a/third_party/WebKit/Source/core/html/HTMLInputElement.cpp
+++ b/third_party/WebKit/Source/core/html/HTMLInputElement.cpp
@@ -1355,11 +1355,15 @@ const AtomicString& HTMLInputElement::alt() const
 
 int HTMLInputElement::maxLength() const
 {
+    if (!hasAttribute(maxlengthAttr))
+        return -1;
     return m_maxLength;
 }
 
 int HTMLInputElement::minLength() const
 {
+    if (!hasAttribute(minlengthAttr))
+        return -1;
     return m_minLength;
 }