[iOS][Autofill] Add honorific prefix field

This CL adds an input field for the honorific prefixes above the
"Full Name" field, accessible from the Autofill Settings View.
The field is visible only when the
kAutofillEnableUIForHonorificPrefixesInSettings feature is enabled.

The entered value will not be saved, because honorifics are temporarily
disabled (crbug/1113617).

Screenshot: https://storage.cloud.google.com/chromium-translation-screenshots/aa5e881149c5eb8c425711c2f3cabad33a45c35e?authuser=0

Bug: 1141884
Change-Id: I353d3b65b96e3960bbf950455da049e0292477a0
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2594749Reviewed-by: Gauthier Ambard <gambard@chromium.org>
Reviewed-by: Viktor Semeniuk <vsemeniuk@google.com>
Reviewed-by: Olivier Robin <olivierrobin@chromium.org>
Commit-Queue: Vidhan Jain <vidhanj@google.com>
Cr-Commit-Position: refs/heads/master@{#840122}

ios/chrome/app/strings/ios_strings.grd

@@ -330,6 +330,9 @@ locale.  The strings in this file are specific to iOS.
       <message name="IDS_IOS_AUTOFILL_SAVE_CARD_BADGE_HINT" desc="Accessibility Hint for the Save Card button which presents the current options to Save a Card. This is spoken by VoiceOver.   [Length:Unlimited] [iOS only]">
         Options to Save Card
       </message>
+      <message name="IDS_IOS_AUTOFILL_HONORIFIC_PREFIX" desc="Title of the field of a profile address representing the title that can be auto-filled by Chrome. [iOS only]" meaning="A 'Title' field in a web form could be a prefix like Ms., Mx., or Dr. or a position held, like Captain or Rabbi. [Length: 15em]">
+           Title
+      </message>
       <message name="IDS_IOS_AUTOFILL_FULLNAME" desc="Title of the field of a profile address representing the full name of the addressee. [Length: 15em] [iOS only]">
         Full Name
       </message>

ios/chrome/app/strings/ios_strings_grd/IDS_IOS_AUTOFILL_HONORIFIC_PREFIX.png.sha1

+aa5e881149c5eb8c425711c2f3cabad33a45c35e

ios/chrome/browser/ui/autofill/autofill_ui_type.h

@@ -20,6 +20,7 @@ typedef NS_ENUM(NSInteger, AutofillUIType) {
   AutofillUITypeCreditCardExpDate,
   AutofillUITypeCreditCardBillingAddress,
   AutofillUITypeCreditCardSaveToChrome,
+  AutofillUITypeProfileHonorificPrefix,
   AutofillUITypeProfileFullName,
   AutofillUITypeProfileCompanyName,
   AutofillUITypeProfileHomeAddressStreet,

ios/chrome/browser/ui/autofill/autofill_ui_type_util.mm

@@ -22,6 +22,8 @@ AutofillUIType AutofillUITypeFromAutofillType(autofill::ServerFieldType type) {
       return AutofillUITypeCreditCardExpMonth;
     case autofill::CREDIT_CARD_EXP_4_DIGIT_YEAR:
       return AutofillUITypeCreditCardExpYear;
+    case autofill::NAME_HONORIFIC_PREFIX:
+      return AutofillUITypeProfileHonorificPrefix;
     case autofill::NAME_FULL:
       return AutofillUITypeProfileFullName;
     case autofill::COMPANY_NAME:
@@ -66,6 +68,8 @@ autofill::ServerFieldType AutofillTypeFromAutofillUIType(AutofillUIType type) {
       return autofill::CREDIT_CARD_EXP_MONTH;
     case AutofillUITypeCreditCardExpYear:
       return autofill::CREDIT_CARD_EXP_4_DIGIT_YEAR;
+    case AutofillUITypeProfileHonorificPrefix:
+      return autofill::NAME_HONORIFIC_PREFIX;
     case AutofillUITypeProfileFullName:
       return autofill::NAME_FULL;
     case AutofillUITypeProfileCompanyName:

ios/chrome/browser/ui/settings/autofill/autofill_profile_edit_table_view_controller.mm

@@ -52,6 +52,9 @@ struct AutofillFieldDisplayInfo {
 };
 
 static const AutofillFieldDisplayInfo kFieldsToDisplay[] = {
+    {autofill::NAME_HONORIFIC_PREFIX, IDS_IOS_AUTOFILL_HONORIFIC_PREFIX,
+     UIReturnKeyNext, UIKeyboardTypeDefault,
+     UITextAutocapitalizationTypeSentences},
     {autofill::NAME_FULL, IDS_IOS_AUTOFILL_FULLNAME, UIReturnKeyNext,
      UIKeyboardTypeDefault, UITextAutocapitalizationTypeSentences},
     {autofill::COMPANY_NAME, IDS_IOS_AUTOFILL_COMPANY_NAME, UIReturnKeyNext,
@@ -187,6 +190,13 @@ static const AutofillFieldDisplayInfo kFieldsToDisplay[] = {
   for (size_t i = 0; i < base::size(kFieldsToDisplay); ++i) {
     const AutofillFieldDisplayInfo& field = kFieldsToDisplay[i];
 
+    if (field.autofillType == autofill::NAME_HONORIFIC_PREFIX &&
+        !base::FeatureList::IsEnabled(
+            autofill::features::
+                kAutofillEnableUIForHonorificPrefixesInSettings)) {
+      continue;
+    }
+
     AutofillEditItem* item =
         [[AutofillEditItem alloc] initWithType:ItemTypeField];
     item.textFieldName = l10n_util::GetNSString(field.displayStringID);