Clear cache after showing Sync confirmation bubble

chrome/browser/ui/webui/ntp/ntp_login_handler.cc

Index: chrome/browser/ui/webui/ntp/ntp_login_handler.cc
diff --git a/chrome/browser/ui/webui/ntp/ntp_login_handler.cc b/chrome/browser/ui/webui/ntp/ntp_login_handler.cc
index c1a007f96bd88c352c32a60631d396d6e684ff00..1629e736d4b2ca175655599d543944430bc6685f 100644
--- a/chrome/browser/ui/webui/ntp/ntp_login_handler.cc
+++ b/chrome/browser/ui/webui/ntp/ntp_login_handler.cc
@@ -29,6 +29,7 @@
 #include "chrome/common/url_constants.h"
 #include "content/browser/tab_contents/tab_contents.h"
 #include "content/public/browser/notification_details.h"
+#include "content/public/browser/notification_service.h"
 #include "grit/chromium_strings.h"
 #include "grit/generated_resources.h"
 #include "ui/base/l10n/l10n_util.h"
@@ -125,6 +126,12 @@ void NTPLoginHandler::RecordInHistogram(int type) {
 void NTPLoginHandler::HandleLoginMessageSeen(const ListValue* args) {
   Profile::FromWebUI(web_ui_)->GetPrefs()->SetBoolean(
       prefs::kSyncPromoShowNTPBubble, false);
+
+  content::NotificationService* service =
+      content::NotificationService::current();
+  service->Notify(chrome::NTP4_SYNC_PROMO_SHOW_NTP_BUBBLE_CHANGED,
+                  content::Source<NTPLoginHandler>(this),
+                  content::NotificationService::NoDetails());
 }
 
 void NTPLoginHandler::HandleShowAdvancedLoginUI(const ListValue* args) {
@@ -178,6 +185,10 @@ bool NTPLoginHandler::ShouldShow(Profile* profile) {
 // static
 void NTPLoginHandler::GetLocalizedValues(Profile* profile,
                                          DictionaryValue* values) {
+  // Always set the URL to prevent i18n missing value errors.
+  values->SetString("login_status_url",
+      google_util::StringAppendGoogleLocaleParam(chrome::kSyncLearnMoreURL));
+
   PrefService* prefs = profile->GetPrefs();
   if (prefs->GetString(prefs::kGoogleServicesUsername).empty() ||
       !prefs->GetBoolean(prefs::kSyncPromoShowNTPBubble)) {
@@ -187,8 +198,6 @@ void NTPLoginHandler::GetLocalizedValues(Profile* profile,
   values->SetString("login_status_message",
       l10n_util::GetStringFUTF16(IDS_SYNC_PROMO_NTP_BUBBLE_MESSAGE,
           l10n_util::GetStringUTF16(IDS_SHORT_PRODUCT_NAME)));
-  values->SetString("login_status_url",
-      google_util::StringAppendGoogleLocaleParam(chrome::kSyncLearnMoreURL));
   values->SetString("login_status_learn_more",
       l10n_util::GetStringUTF16(IDS_LEARN_MORE));
   values->SetString("login_status_advanced",