Add the suggestions UI in chrome

ios/chrome/browser/experimental_flags.mm

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // This file can be empty. Its purpose is to contain the relatively short lived
 // definitions required for experimental flags.
 
 #include "ios/chrome/browser/experimental_flags.h"
 
 #include <dispatch/dispatch.h>
@@ skipping 27 matching lines @@
 NSString* const kForceResetContextualSearch = @"ForceResetContextualSearch";
 NSString* const kGaiaEnvironment = @"GAIAEnvironment";
 NSString* const kHeuristicsForPasswordGeneration =
     @"HeuristicsForPasswordGeneration";
 NSString* const kMDMIntegrationDisabled = @"MDMIntegrationDisabled";
 NSString* const kOriginServerHost = @"AlternateOriginServerHost";
 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};
 
 }  // namespace
 
 namespace experimental_flags {
 
 bool AlwaysDisplayFirstRun() {
   return
@@ skipping 244 matching lines @@
 bool UseOnlyLocalHeuristicsForPasswordGeneration() {
   if ([[NSUserDefaults standardUserDefaults]
           boolForKey:kHeuristicsForPasswordGeneration]) {
     return true;
   }
   base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
   return command_line->HasSwitch(
       autofill::switches::kLocalHeuristicsOnlyForPasswordGeneration);
 }
 
+bool IsSuggestionsUIEnabled() {
+  return [[NSUserDefaults standardUserDefaults] boolForKey:kEnableSuggestions];
+}
+
 }  // namespace experimental_flags