Initialize did_run_updater_ in browser startup.

This was mistakenly removed in crrev.com/2621363002.

BUG=721562

Review-Url: https://codereview.chromium.org/2879683004
Cr-Commit-Position: refs/heads/master@{#471121}

chrome/browser/chrome_browser_main_win.cc

@@ -381,6 +381,10 @@ void ChromeBrowserMainPartsWin::PostBrowserStart() {
 
   InitializeChromeElf();
 
+#if defined(GOOGLE_CHROME_BUILD)
+  did_run_updater_.reset(new DidRunUpdater);
+#endif
+
   if (base::FeatureList::IsEnabled(safe_browsing::kSettingsResetPrompt)) {
     content::BrowserThread::PostAfterStartupTask(
         FROM_HERE,