Convert SaveCardBubbleControllerImpl to use the new navigation callbacks.

chrome/browser/ui/autofill/save_card_bubble_controller_impl.h

Index: chrome/browser/ui/autofill/save_card_bubble_controller_impl.h
diff --git a/chrome/browser/ui/autofill/save_card_bubble_controller_impl.h b/chrome/browser/ui/autofill/save_card_bubble_controller_impl.h
index 1831665718c8fc6e32b0250b16f350591b795e74..d5268d028abf9f892981b8027e21f5a163bfdccd 100644
--- a/chrome/browser/ui/autofill/save_card_bubble_controller_impl.h
+++ b/chrome/browser/ui/autofill/save_card_bubble_controller_impl.h
@@ -66,9 +66,8 @@ class SaveCardBubbleControllerImpl
   virtual base::TimeDelta Elapsed() const;
 
   // content::WebContentsObserver:
-  void DidNavigateMainFrame(
-      const content::LoadCommittedDetails& details,
-      const content::FrameNavigateParams& params) override;
+  void DidFinishNavigation(
+      content::NavigationHandle* navigation_handle) override;
 
  private:
   friend class content::WebContentsUserData<SaveCardBubbleControllerImpl>;