Do not tie cleanup tool download to SRTPromptFieldTrial field trial

chrome/browser/safe_browsing/chrome_cleaner/srt_field_trial_win.cc

Index: chrome/browser/safe_browsing/chrome_cleaner/srt_field_trial_win.cc
diff --git a/chrome/browser/safe_browsing/chrome_cleaner/srt_field_trial_win.cc b/chrome/browser/safe_browsing/chrome_cleaner/srt_field_trial_win.cc
index 4b2faab3d5518b486617a8a5721507d8e5c2614d..c3e00144da6f101b16b073e7f834d58fa86cb6a3 100644
--- a/chrome/browser/safe_browsing/chrome_cleaner/srt_field_trial_win.cc
+++ b/chrome/browser/safe_browsing/chrome_cleaner/srt_field_trial_win.cc
@@ -43,6 +43,9 @@ namespace safe_browsing {
 const base::Feature kInBrowserCleanerUIFeature{
     "InBrowserCleanerUI", base::FEATURE_DISABLED_BY_DEFAULT};
 
+const base::Feature kCleanerDownloadFeature{"DownloadCleanupToolByBitness",
+                                            base::FEATURE_DISABLED_BY_DEFAULT};
+
 bool IsInSRTPromptFieldTrialGroups() {
   return !base::StartsWith(base::FieldTrialList::FindFullName(kSRTPromptTrial),
                            kSRTPromptOffGroup, base::CompareCase::SENSITIVE);
@@ -71,7 +74,8 @@ GURL GetLegacyDownloadURL() {
 GURL GetSRTDownloadURL() {
   constexpr char kDownloadGroupParam[] = "download_group";
   const std::string download_group =
-      variations::GetVariationParamValue(kSRTPromptTrial, kDownloadGroupParam);
+      variations::GetVariationParamValueByFeature(kCleanerDownloadFeature,

[csharp, 2017/06/21 08:36:24]

This version seems to be deprecated now, please use
base::GetFieldTrialParamValueByFeature

[veranika, 2017/06/21 14:55:23]

Done.

+                                                  kDownloadGroupParam);
   if (download_group.empty())
     return GetLegacyDownloadURL();