[iOS] Add Omnibox NTP ZPS suggestion flag

This flag already exists and is used for this purpose on Android and
Desktop. This adds the flag to iOS.

Bug: 1048193
Change-Id: Ia50dbcc3994cc74592f821a3fbc6c3f74ff785a5
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2056776Reviewed-by: Ender <ender@google.com>
Reviewed-by: Stepan Khapugin <stkhapugin@chromium.org>
Commit-Queue: Robbie Gibson <rkgibson@google.com>
Cr-Commit-Position: refs/heads/master@{#742553}

ios/chrome/browser/flags/about_flags.mm

@@ -189,6 +189,16 @@ const FeatureEntry::FeatureVariation
          base::size(kOmniboxOnDeviceHeadSuggestDelay350MsAndRelevance1000),
          nullptr}};
 
+const FeatureEntry::FeatureParam kOmniboxNTPZPSRemote[] = {
+    {"ZeroSuggestVariant:1:*", "RemoteNoUrl"},
+    {"ZeroSuggestVariant:7:*", "RemoteNoUrl"},
+    {"ZeroSuggestVariant:8:*", "RemoteNoUrl"}};
+
+const FeatureEntry::FeatureVariation kOmniboxOnFocusSuggestionsVariations[] = {
+    {"ZPS on NTP: Remote History", kOmniboxNTPZPSRemote,
+     base::size(kOmniboxNTPZPSRemote), "t3316653" /* variation_id */},
+};
+
 const FeatureEntry::FeatureParam kOmniboxUIMaxAutocompleteMatches3[] = {
     {OmniboxFieldTrial::kUIMaxAutocompleteMatchesParam, "3"}};
 const FeatureEntry::FeatureParam kOmniboxUIMaxAutocompleteMatches4[] = {
@@ -383,6 +393,12 @@ const flags_ui::FeatureEntry kFeatureEntries[] = {
          omnibox::kOnDeviceHeadProvider,
          kOmniboxOnDeviceHeadSuggestExperimentVariations,
          "OmniboxOnDeviceHeadSuggestIOS")},
+    {"omnibox-on-focus-suggestions",
+     flag_descriptions::kOmniboxOnFocusSuggestionsName,
+     flag_descriptions::kOmniboxOnFocusSuggestionsDescription, flags_ui::kOsIos,
+     FEATURE_WITH_PARAMS_VALUE_TYPE(omnibox::kOnFocusSuggestions,
+                                    kOmniboxOnFocusSuggestionsVariations,
+                                    "OmniboxBundledExperimentV1")},
     {"omnibox-ui-max-autocomplete-matches",
      flag_descriptions::kOmniboxUIMaxAutocompleteMatchesName,
      flag_descriptions::kOmniboxUIMaxAutocompleteMatchesDescription,

ios/chrome/browser/flags/ios_chrome_flag_descriptions.cc

@@ -314,6 +314,12 @@ const char kOmniboxOnDeviceHeadSuggestionsDescription[] =
     "Shows Google head non personalized search suggestions provided by a "
     "compact on device model";
 
+const char kOmniboxOnFocusSuggestionsName[] = "Omnibox on-focus suggestions";
+const char kOmniboxOnFocusSuggestionsDescription[] =
+    "Configures Omnibox on-focus suggestions - suggestions displayed on-focus "
+    "before the user has typed any input. This provides overrides for the "
+    "default suggestion locations.";
+
 const char kPageInfoRefactoringName[] = "New design of the page info";
 const char kPageInfoRefactoringDescription[] =
     "Uses the new design for the page security info.";

ios/chrome/browser/flags/ios_chrome_flag_descriptions.h

@@ -269,6 +269,10 @@ extern const char kOmniboxUIMaxAutocompleteMatchesDescription[];
 extern const char kOmniboxOnDeviceHeadSuggestionsName[];
 extern const char kOmniboxOnDeviceHeadSuggestionsDescription[];
 
+// Title and description for the flag to control Omnibox on-focus suggestions.
+extern const char kOmniboxOnFocusSuggestionsName[];
+extern const char kOmniboxOnFocusSuggestionsDescription[];
+
 // Title and description for the flag to enable the new design of the page info.
 extern const char kPageInfoRefactoringName[];
 extern const char kPageInfoRefactoringDescription[];