Initialize variations seed fetching via OnAppEnterForeground.

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 998c36218d2d464397af86505576ba5a441f542a..be50f720e7d6e1fe20f9d85947c8596da4d27352 100644
--- a/chrome/browser/chrome_browser_main.cc
+++ b/chrome/browser/chrome_browser_main.cc
@@ -1503,8 +1503,9 @@ int ChromeBrowserMainParts::PreMainMessageLoopRunImpl() {
   chrome_variations::VariationsService* variations_service =
       browser_process_->variations_service();
   if (variations_service) {
+    // Just initialize the policy prefs service here. Variations seed fetching
+    // will be initialized when the app enters foreground mode.
     variations_service->set_policy_pref_service(profile_->GetPrefs());
-    variations_service->StartRepeatedVariationsSeedFetch();
   }
   translate::TranslateDownloadManager::RequestLanguageList(
       profile_->GetPrefs());