[iOS] Add flag override for local ZPS suggestions

Bug: 1048193
Change-Id: I88197efee6176e72d9b4c6591bb17650158fdf8a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2201599
Commit-Queue: Ender <ender@google.com>
Reviewed-by: Ender <ender@google.com>
Cr-Commit-Position: refs/heads/master@{#768922}

ios/chrome/browser/flags/about_flags.mm

@@ -186,10 +186,22 @@ const FeatureEntry::FeatureParam kOmniboxNTPZPSRemote[] = {
     {"ZeroSuggestVariant:1:*", "RemoteNoUrl"},
     {"ZeroSuggestVariant:7:*", "RemoteNoUrl"},
     {"ZeroSuggestVariant:8:*", "RemoteNoUrl"}};
+const FeatureEntry::FeatureParam kOmniboxNTPZPSLocal[] = {
+    {"ZeroSuggestVariant:1:*", "Local"},
+    {"ZeroSuggestVariant:7:*", "Local"},
+    {"ZeroSuggestVariant:8:*", "Local"}};
+const FeatureEntry::FeatureParam kOmniboxNTPZPSRemoteLocal[] = {
+    {"ZeroSuggestVariant:1:*", "RemoteNoUrl,Local"},
+    {"ZeroSuggestVariant:7:*", "RemoteNoUrl,Local"},
+    {"ZeroSuggestVariant:8:*", "RemoteNoUrl,Local"}};
 
 const FeatureEntry::FeatureVariation kOmniboxOnFocusSuggestionsVariations[] = {
+    {"ZPS on NTP: Local History", kOmniboxNTPZPSLocal,
+     base::size(kOmniboxNTPZPSLocal), nullptr /* variation_id */},
     {"ZPS on NTP: Remote History", kOmniboxNTPZPSRemote,
      base::size(kOmniboxNTPZPSRemote), "t3316728" /* variation_id */},
+    {"ZPS on NTP: Remote History, Local History", kOmniboxNTPZPSRemoteLocal,
+     base::size(kOmniboxNTPZPSRemoteLocal), "t3316728" /* variation_id */},
 };
 
 const FeatureEntry::FeatureParam kOmniboxUIMaxAutocompleteMatches3[] = {