Add flag variant for Proactive ZPS on NTP.

This change introduces only a flag variant for existing feature switch
that will allow presenting PZPS on NTP.

Bug: 1085256
Change-Id: I29a03f9bfaca6c521adaaad37c6eb652d8d52a72
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2211240
Commit-Queue: Ender <ender@google.com>
Reviewed-by: Ted Choc <tedchoc@chromium.org>
Cr-Commit-Position: refs/heads/master@{#770886}

chrome/browser/about_flags.cc

@@ -1058,6 +1058,10 @@ const FeatureEntry::FeatureParam kOmniboxNTPZPSRemote[] = {
     {"ZeroSuggestVariant:1:*", "RemoteNoUrl"},
     {"ZeroSuggestVariant:7:*", "RemoteNoUrl"},
     {"ZeroSuggestVariant:8:*", "RemoteNoUrl"}};
+const FeatureEntry::FeatureParam kOmniboxNTPZPSRemoteLocal[] = {
+    {"ZeroSuggestVariant:1:*", "RemoteNoUrl,Local"},
+    {"ZeroSuggestVariant:7:*", "RemoteNoUrl,Local"},
+    {"ZeroSuggestVariant:8:*", "RemoteNoUrl,Local"}};
 #else   // !defined(OS_ANDROID)
 const FeatureEntry::FeatureParam kNTPOmniboxZPSRemoteLocal[] = {
     {"ZeroSuggestVariant:1:*", "RemoteNoUrl,Local"},
@@ -1081,6 +1085,8 @@ const FeatureEntry::FeatureVariation kOmniboxOnFocusSuggestionsVariations[] = {
      base::size(kOmniboxNTPZPSRemote), /* variation_id */ "t3317456"},
     {"ZPS on NTP: Onboarding", kOmniboxNTPZPSRemote,
      base::size(kOmniboxNTPZPSRemote), /* variation_id */ "t3316638"},
+    {"ZPS on NTP: PZPS, Remote, Local", kOmniboxNTPZPSRemoteLocal,
+     base::size(kOmniboxNTPZPSRemoteLocal), /* variation_id */ "t3317569"},
 #else   // !defined(OS_ANDROID)
     {"NTP Omnibox - Remote History, Local History", kNTPOmniboxZPSRemoteLocal,
      base::size(kNTPOmniboxZPSRemoteLocal), "t3316133" /* variation_id */},