Re-prompt Chrome users to run the SRT when a finch param changes.

chrome/browser/prefs/chrome_pref_service_factory.cc

 // Copyright (c) 2012 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 "chrome/browser/prefs/chrome_pref_service_factory.h"
 
 #include <string>
 #include <vector>
 
 #include "base/bind.h"
@@ skipping 199 matching lines @@
     PrefHashFilter::TRACKING_STRATEGY_ATOMIC,
     PrefHashFilter::VALUE_IMPERSONAL
   },
 #endif
   {
     21, prefs::kGoogleServicesUsername,
     PrefHashFilter::ENFORCE_ON_LOAD,
     PrefHashFilter::TRACKING_STRATEGY_ATOMIC,
     PrefHashFilter::VALUE_PERSONAL
   },
+#if defined(OS_WIN)
+  {
+    22, prefs::kSwReporterPromptSeed,
+    PrefHashFilter::ENFORCE_ON_LOAD,
+    PrefHashFilter::TRACKING_STRATEGY_ATOMIC,
+    PrefHashFilter::VALUE_IMPERSONAL
+  },
+#endif
   // See note at top, new items added here also need to be added to
   // histograms.xml's TrackedPreference enum.
 };
 
 // One more than the last tracked preferences ID above.
 const size_t kTrackedPrefsReportingIDsCount =
     kTrackedPrefs[arraysize(kTrackedPrefs) - 1].reporting_id + 1;
 
 // Each group enforces a superset of the protection provided by the previous
 // one.
@@ skipping 300 matching lines @@
 
 void RegisterProfilePrefs(user_prefs::PrefRegistrySyncable* registry) {
   ProfilePrefStoreManager::RegisterProfilePrefs(registry);
 }
 
 void RegisterPrefs(PrefRegistrySimple* registry) {
   ProfilePrefStoreManager::RegisterPrefs(registry);
 }
 
 }  // namespace chrome_prefs