Add other variations (with ids) for NTPSnippets to chrome://flags

components/variations/variations_http_header_provider.cc

 // Copyright 2014 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.
 
 #include "components/variations/variations_http_header_provider.h"
 
 #include <stddef.h>
 
 #include <set>
 #include <string>
@@ skipping 39 matching lines @@
     base::AutoLock scoped_lock(lock_);
     for (VariationID id : GetAllVariationIds()) {
       ids_string.append(base::IntToString(id));
       ids_string.push_back(' ');
     }
   }
   return ids_string;
 }
 
 bool VariationsHttpHeaderProvider::SetDefaultVariationIds(
-    const std::string& variation_ids) {
+    const std::vector<std::string>& variation_ids) {
   default_variation_ids_set_.clear();
   default_trigger_id_set_.clear();
-  for (const base::StringPiece& entry : base::SplitStringPiece(
-           variation_ids, ",", base::TRIM_WHITESPACE, base::SPLIT_WANT_ALL)) {
+  for (const std::string& entry : variation_ids) {
     if (entry.empty()) {
       default_variation_ids_set_.clear();
       default_trigger_id_set_.clear();
       return false;
     }
     bool trigger_id =
         base::StartsWith(entry, "t", base::CompareCase::SENSITIVE);
     // Remove the "t" prefix if it's there.
     base::StringPiece trimmed_entry = trigger_id ? entry.substr(1) : entry;
 
@@ skipping 149 matching lines @@
 
   std::set<VariationID> all_variation_ids_set = default_variation_ids_set_;
   for (VariationID id : variation_ids_set_)
     all_variation_ids_set.insert(id);
   for (VariationID id : synthetic_variation_ids_set_)
     all_variation_ids_set.insert(id);
   return all_variation_ids_set;
 }
 
 }  // namespace variations