[Extensions] Polish the suspicious extension bubble

chrome/browser/extensions/ntp_overridden_bubble_controller.cc

Index: chrome/browser/extensions/ntp_overridden_bubble_controller.cc
diff --git a/chrome/browser/extensions/ntp_overridden_bubble_controller.cc b/chrome/browser/extensions/ntp_overridden_bubble_controller.cc
index 317b7bae84dc03e7be794a0eee09db1ae85c251b..d78bee5c9fc5462154e57fd6798bfdba77561d12 100644
--- a/chrome/browser/extensions/ntp_overridden_bubble_controller.cc
+++ b/chrome/browser/extensions/ntp_overridden_bubble_controller.cc
@@ -40,7 +40,8 @@ class NtpOverriddenBubbleDelegate
       override;
   void PerformAction(const extensions::ExtensionIdList& list) override;
   base::string16 GetTitle() const override;
-  base::string16 GetMessageBody(bool anchored_to_browser_action) const override;
+  base::string16 GetMessageBody(bool anchored_to_browser_action,
+                                bool for_single_extension) const override;
   base::string16 GetOverflowText(
       const base::string16& overflow_count) const override;
   GURL GetLearnMoreUrl() const override;
@@ -112,7 +113,8 @@ base::string16 NtpOverriddenBubbleDelegate::GetTitle() const {
 }
 
 base::string16 NtpOverriddenBubbleDelegate::GetMessageBody(
-    bool anchored_to_browser_action) const {
+    bool anchored_to_browser_action,
+    bool for_single_extension) const {
   base::string16 body =
       l10n_util::GetStringUTF16(IDS_EXTENSIONS_NTP_CONTROLLED_FIRST_LINE);
   body += l10n_util::GetStringUTF16(