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

components/autofill/core/browser/validation.h

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef COMPONENTS_AUTOFILL_CORE_BROWSER_VALIDATION_H_
 #define COMPONENTS_AUTOFILL_CORE_BROWSER_VALIDATION_H_
 
 #include "base/strings/string16.h"
 #include "base/strings/string_piece.h"
 #include "components/autofill/core/browser/field_types.h"
@@ skipping 27 matching lines @@
     const std::set<std::string>& supported_basic_card_networks,
     base::string16* error_message);
 
 // Returns true if |text| looks like a valid e-mail address.
 bool IsValidEmailAddress(const base::string16& text);
 
 // Returns true if |text| is a valid US state name or abbreviation.  It is case
 // insensitive.  Valid for US states only.
 bool IsValidState(const base::string16& text);
 
+// Returns whether the number contained in |text| is valid for the specified
+// |country_code|. Callers should cache the result as the parsing is expensive.
+bool IsValidPhoneNumber(const base::string16& text,
+                        const std::string& country_code);
+
 // Returns true if |text| looks like a valid zip code.
 // Valid for US zip codes only.
 bool IsValidZip(const base::string16& text);
 
 // Returns true if |text| looks like an SSN, with or without separators.
 bool IsSSN(const base::string16& text);
 
 // Returns whether |value| is valid for the given |type|. If not null,
 // |error_message| is populated when the function returns false.
 bool IsValidForType(const base::string16& value,
                     ServerFieldType type,
                     base::string16* error_message);
 
 }  // namespace autofill
 
 #endif  // COMPONENTS_AUTOFILL_CORE_BROWSER_VALIDATION_H_