Add the suggestions UI in chrome

ios/chrome/browser/experimental_flags.mm

Index: ios/chrome/browser/experimental_flags.mm
diff --git a/ios/chrome/browser/experimental_flags.mm b/ios/chrome/browser/experimental_flags.mm
index d4d26e79b45f1c77b767dc37432cee10890fea8a..8bea1c5239878798336fb94925d4dbaa15fc7067 100644
--- a/ios/chrome/browser/experimental_flags.mm
+++ b/ios/chrome/browser/experimental_flags.mm
@@ -45,6 +45,7 @@ NSString* const kPendingIndexNavigationDisabled =
     @"PendingIndexNavigationDisabled";
 NSString* const kSafariVCSignInDisabled = @"SafariVCSignInDisabled";
 NSString* const kWhatsNewPromoStatus = @"WhatsNewPromoStatus";
+NSString* const kEnableSuggestions = @"EnableSuggestions";
 
 const base::Feature kIOSDownloadImageRenaming{
     "IOSDownloadImageRenaming", base::FEATURE_DISABLED_BY_DEFAULT};
@@ -309,4 +310,8 @@ bool UseOnlyLocalHeuristicsForPasswordGeneration() {
       autofill::switches::kLocalHeuristicsOnlyForPasswordGeneration);
 }
 
+bool IsSuggestionsUIEnabled() {
+  return [[NSUserDefaults standardUserDefaults] boolForKey:kEnableSuggestions];
+}
+
 }  // namespace experimental_flags