Rename BrowserInit to StartupBrowserCreator, and move into startup subdir.

chrome/browser/ui/browser.cc

Index: chrome/browser/ui/browser.cc
===================================================================
--- chrome/browser/ui/browser.cc	(revision 136345)
+++ chrome/browser/ui/browser.cc	(working copy)
@@ -2364,11 +2364,11 @@
   // This really belongs in platform code, but there's no good place to
   // initialize it between the time when the AppController is created
   // (where there's no profile) and the time the controller gets another
-  // crack at the start of the main event loop. By that time, BrowserInit
-  // has already created the browser window, and it's too late: we need the
-  // pref to be already initialized. Doing it here also saves us from having
-  // to hard-code pref registration in the several unit tests that use
-  // this preference.
+  // crack at the start of the main event loop. By that time,
+  // StartupBrowserCreator has already created the browser window, and it's too
+  // late: we need the pref to be already initialized. Doing it here also saves
+  // us from having to hard-code pref registration in the several unit tests
+  // that use this preference.
   prefs->RegisterBooleanPref(prefs::kShowUpdatePromotionInfoBar,
                              true,
                              PrefService::UNSYNCABLE_PREF);