autocomplete: support address-line3, address-level{1,2,3}

components/autofill/core/browser/field_types.h

Index: components/autofill/core/browser/field_types.h
diff --git a/components/autofill/core/browser/field_types.h b/components/autofill/core/browser/field_types.h
index 4febf7c4edc4505b8b7901c7517886939c9e6f8a..dd09cbdc99641d11d64d1deb1ba6258cea9c30db 100644
--- a/components/autofill/core/browser/field_types.h
+++ b/components/autofill/core/browser/field_types.h
@@ -132,10 +132,14 @@ enum ServerFieldType {
   ADDRESS_HOME_DEPENDENT_LOCALITY = 81,
   ADDRESS_BILLING_DEPENDENT_LOCALITY = 82,
 
+  // The third line of the street address.
+  ADDRESS_HOME_LINE3 = 83,
+  ADDRESS_BILLING_LINE3 = 84,
+
   // No new types can be added without a corresponding change to the Autofill
   // server.
 
-  MAX_VALID_FIELD_TYPE = 83,
+  MAX_VALID_FIELD_TYPE = 85,
 };
 
 // The list of all HTML autocomplete field type hints supported by Chrome.
@@ -157,12 +161,14 @@ enum HtmlFieldType {
   HTML_TYPE_STREET_ADDRESS,
   HTML_TYPE_ADDRESS_LINE1,
   HTML_TYPE_ADDRESS_LINE2,
-  HTML_TYPE_LOCALITY,      // For U.S. addresses, corresponds to the city.
-  HTML_TYPE_REGION,        // For U.S. addresses, corresponds to the state.
-  HTML_TYPE_COUNTRY_CODE,  // The ISO 3166-1-alpha-2 country code.
-  HTML_TYPE_COUNTRY_NAME,  // The localized country name.
+  HTML_TYPE_ADDRESS_LINE3,
+  HTML_TYPE_ADDRESS_LEVEL1,  // For U.S. addresses, corresponds to the state.
+  HTML_TYPE_ADDRESS_LEVEL2,  // For U.S. addresses, corresponds to the city.
+  HTML_TYPE_ADDRESS_LEVEL3,  // An area that is more specific than LEVEL2.
+  HTML_TYPE_COUNTRY_CODE,    // The ISO 3166-1-alpha-2 country code.
+  HTML_TYPE_COUNTRY_NAME,    // The localized country name.
   HTML_TYPE_POSTAL_CODE,
-  HTML_TYPE_FULL_ADDRESS,  // The complete address, formatted for display.
+  HTML_TYPE_FULL_ADDRESS,    // The complete address, formatted for display.
 
   // Credit card types.
   HTML_TYPE_CREDIT_CARD_NAME,