Implement minlength for <input> and <textarea>.

Source/core/html/forms/InputType.cpp

Index: Source/core/html/forms/InputType.cpp
diff --git a/Source/core/html/forms/InputType.cpp b/Source/core/html/forms/InputType.cpp
index 27d69d87471e9b92722ef3773c1e1286a022f858..40060d0c4cf8d29cb3bfbd2146220f947c98cb14 100644
--- a/Source/core/html/forms/InputType.cpp
+++ b/Source/core/html/forms/InputType.cpp
@@ -239,6 +239,11 @@ bool InputType::tooLong(const String&, HTMLTextFormControlElement::NeedsToCheckD
     return false;
 }
 
+bool InputType::tooShort(const String&, HTMLTextFormControlElement::NeedsToCheckDirtyFlag) const
+{
+    return false;
+}
+
 bool InputType::patternMismatch(const String&) const
 {
     return false;
@@ -370,6 +375,11 @@ String InputType::validationMessage() const
     if (element().tooLong())
         return locale().validationMessageTooLongText(value.length(), element().maxLength());
 
+    if (element().tooShort())
+        return "Too short"; // DO NOT CHECK IN!!!

[keishi, 2014/10/06 03:58:23]

We don't need this comment. "check in" in Blink probably means commit to the
repo so this isn't accurate.

[Bartek Nowierski, 2014/10/06 13:18:16]

That was just a note to self and to the reviewer that this line must not  be
submitted to the main repository

+    // TODO(bartekn): Add a localized message for tooShort().
+    //     return locale().validationMessageTooShortText(value().length(), element.minLength());

[keishi, 2014/10/06 03:58:23]

We don't need this line. Blink doesn't keep code in comments.

[Bartek Nowierski, 2014/10/06 13:18:16]

Similarly here, this wasn't meant to be submitted to the main repository. That
was just a note to myself to uncomment this line once I implement the localized
message.

+
     if (!isSteppable())
         return emptyString();