Update Autofill Private API to provide a list of available countries.

chrome/browser/extensions/api/autofill_private/autofill_private_api.h

 // Copyright 2015 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 CHROME_BROWSER_EXTENSIONS_API_AUTOFILL_PRIVATE_AUTOFILL_PRIVATE_API_H_
 #define CHROME_BROWSER_EXTENSIONS_API_AUTOFILL_PRIVATE_AUTOFILL_PRIVATE_API_H_
 
 #include <string>
 
 #include "base/macros.h"
@@ skipping 13 matching lines @@
 
   // ExtensionFunction overrides.
   ResponseAction Run() override;
 
  private:
   ChromeExtensionFunctionDetails chrome_details_;
 
   DISALLOW_COPY_AND_ASSIGN(AutofillPrivateSaveAddressFunction);
 };
 
+class AutofillPrivateGetCountryListFunction : public UIThreadExtensionFunction {
+ public:
+  AutofillPrivateGetCountryListFunction();
+  DECLARE_EXTENSION_FUNCTION("autofillPrivate.getCountryList",
+                             AUTOFILLPRIVATE_GETCOUNTRYLIST);
+
+ protected:
+  ~AutofillPrivateGetCountryListFunction() override;
+
+  // ExtensionFunction overrides.
+  ResponseAction Run() override;
+
+ private:
+  ChromeExtensionFunctionDetails chrome_details_;
+
+  DISALLOW_COPY_AND_ASSIGN(AutofillPrivateGetCountryListFunction);
+};
+
+
 class AutofillPrivateGetAddressComponentsFunction :
     public UIThreadExtensionFunction {
  public:
   AutofillPrivateGetAddressComponentsFunction() {}
   DECLARE_EXTENSION_FUNCTION("autofillPrivate.getAddressComponents",
                              AUTOFILLPRIVATE_GETADDRESSCOMPONENTS);
 
  protected:
   ~AutofillPrivateGetAddressComponentsFunction() override;
 
@@ skipping 108 matching lines @@
 
  private:
   ChromeExtensionFunctionDetails chrome_details_;
 
   DISALLOW_COPY_AND_ASSIGN(AutofillPrivateGetCreditCardListFunction);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_AUTOFILL_PRIVATE_AUTOFILL_PRIVATE_API_H_