Identify the omnibox as a URL field.

views/controls/textfield/textfield.cc

Index: views/controls/textfield/textfield.cc
diff --git a/views/controls/textfield/textfield.cc b/views/controls/textfield/textfield.cc
index 8061126d257cd0d41f57000510b0c9985f041461..df7a4394600fb503b9c2ab50cd019781f8294eba 100644
--- a/views/controls/textfield/textfield.cc
+++ b/views/controls/textfield/textfield.cc
@@ -107,6 +107,17 @@ void Textfield::SetPassword(bool password) {
     native_wrapper_->UpdateIsPassword();
 }
 
+bool Textfield::IsUrl() const {
+  return style_ & STYLE_URL;
+}
+
+void Textfield::SetUrl(bool url) {
+  if (url)
+    style_ = static_cast<StyleFlags>(style_ | STYLE_URL);
+  else
+    style_ = static_cast<StyleFlags>(style_ & ~STYLE_URL);
+}
+
 void Textfield::SetText(const string16& text) {
   text_ = text;
   if (native_wrapper_)