[Payments] In shipping address editor, enable required + phone validation.

components/autofill/core/browser/validation.cc

Index: components/autofill/core/browser/validation.cc
diff --git a/components/autofill/core/browser/validation.cc b/components/autofill/core/browser/validation.cc
index d18ccbab5cfd28477a394617fa1acf7c92210ab4..71a98fdfd958a27be72999e0043329e845f76d2a 100644
--- a/components/autofill/core/browser/validation.cc
+++ b/components/autofill/core/browser/validation.cc
@@ -14,6 +14,7 @@
 #include "base/time/time.h"
 #include "components/autofill/core/browser/autofill_data_util.h"
 #include "components/autofill/core/browser/credit_card.h"
+#include "components/autofill/core/browser/phone_number_i18n.h"
 #include "components/autofill/core/browser/state_names.h"
 #include "components/autofill/core/common/autofill_clock.h"
 #include "components/autofill/core/common/autofill_regexes.h"
@@ -137,6 +138,12 @@ bool IsValidState(const base::string16& text) {
          !state_names::GetNameForAbbreviation(text).empty();
 }
 
+bool IsValidPhoneNumber(const base::string16& text,
+                        const std::string& country_code) {
+  i18n::PhoneObject phone_number(text, country_code);
+  return phone_number.IsValidNumber();
+}
+
 bool IsValidZip(const base::string16& text) {
   const base::string16 kZipPattern = base::ASCIIToUTF16("^\\d{5}(-\\d{4})?$");
   return MatchesPattern(text, kZipPattern);