[Autofill] Respect the autocomplete=off attribute.

third_party/WebKit/Source/web/WebFormControlElement.cpp

Index: third_party/WebKit/Source/web/WebFormControlElement.cpp
diff --git a/third_party/WebKit/Source/web/WebFormControlElement.cpp b/third_party/WebKit/Source/web/WebFormControlElement.cpp
index c78a0477d3519b603a03ff903e4197a2b52a16df..0c65d270e1e4ebcf440b4ddf5dda077a834a4b85 100644
--- a/third_party/WebKit/Source/web/WebFormControlElement.cpp
+++ b/third_party/WebKit/Source/web/WebFormControlElement.cpp
@@ -83,6 +83,8 @@ bool WebFormControlElement::autoComplete() const
         return constUnwrap<HTMLInputElement>()->shouldAutocomplete();
     if (isHTMLTextAreaElement(*m_private))
         return constUnwrap<HTMLTextAreaElement>()->shouldAutocomplete();
+    if (isHTMLSelectElement(*m_private))
+        return constUnwrap<HTMLSelectElement>()->shouldAutocomplete();
     return false;
 }