Remove kDistroDict from Preferences.

chrome/browser/first_run/first_run.h

Index: chrome/browser/first_run/first_run.h
diff --git a/chrome/browser/first_run/first_run.h b/chrome/browser/first_run/first_run.h
index 001b33966a40a8427a5ef756b7bbebb58cab472f..725dade1401126f7b4018063d956907f6a3c2df3 100644
--- a/chrome/browser/first_run/first_run.h
+++ b/chrome/browser/first_run/first_run.h
@@ -24,10 +24,6 @@ namespace content {
 class WebContents;
 }
 
-namespace user_prefs {
-class PrefRegistrySyncable;
-}
-
 // This namespace contains the chrome first-run installation actions needed to
 // fully test the custom installer. It also contains the opposite actions to
 // execute during uninstall. When the first run UI is ready we won't
@@ -75,7 +71,6 @@ struct MasterPrefs {
   // remove items from here which are being stored temporarily only to be later
   // dumped into local_state. Also see related TODO in chrome_browser_main.cc.
 
-  int ping_delay;
   bool homepage_defined;
   int do_import_items;
   int dont_import_items;
@@ -116,12 +111,6 @@ bool IsMetricsReportingOptIn();
 // (http://crbug.com/264694).
 void CreateSentinelIfNeeded();
 
-// Get RLZ ping delay pref name.
-std::string GetPingDelayPrefName();
-
-// Register user preferences used by the MasterPrefs structure.
-void RegisterProfilePrefs(user_prefs::PrefRegistrySyncable* registry);
-
 // Sets the kShowFirstRunBubbleOption local state pref so that the browser
 // shows the bubble once the main message loop gets going (or refrains from
 // showing the bubble, if |show_bubble| is not FIRST_RUN_BUBBLE_SHOW).