Remove kDistroDict from Preferences.

chrome/browser/chrome_browser_main.cc

Index: chrome/browser/chrome_browser_main.cc
diff --git a/chrome/browser/chrome_browser_main.cc b/chrome/browser/chrome_browser_main.cc
index 4dda69d677d3fd1a817eebd5e2ddf0966229a6e0..97fbd0e377146ce6b1d75e9590051361f2fd7b55 100644
--- a/chrome/browser/chrome_browser_main.cc
+++ b/chrome/browser/chrome_browser_main.cc
@@ -1742,9 +1742,7 @@ int ChromeBrowserMainParts::PreMainMessageLoopRunImpl() {
   // Init the RLZ library. This just binds the dll and schedules a task on the
   // file thread to be run sometime later. If this is the first run we record
   // the installation event.
-  PrefService* pref_service = profile_->GetPrefs();
-  int ping_delay = first_run::IsChromeFirstRun() ? master_prefs_->ping_delay :
-      pref_service->GetInteger(first_run::GetPingDelayPrefName().c_str());
+  int ping_delay = profile_->GetPrefs()->GetInteger(prefs::kRlzPingDelay);
   // Negative ping delay means to send ping immediately after a first search is
   // recorded.
   rlz::RLZTracker::SetRlzDelegate(