[Upstream Feedback] BugFix: Fix the issue that address cannot be saved.

This CL fixes the problem that Chrome settings page won't refresh
itself after exiting from a Incognito window and saving a new address.

The root reason requires more investigation but this CL will fix the
RB bug. SaveCardBubbleControllerImpl does not need to be created again
(even though creating a new controller should not hurt)
since if there is no controller then the promo is not visible.

Bug: 1016669, 932818, 1024041
Change-Id: I7a8c3dc144ddb1b6b11672efe8e1dfd6b9a15b32
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1898717Reviewed-by: Peter Boström <pbos@chromium.org>
Reviewed-by: Evan Stade <estade@chromium.org>
Commit-Queue: Siyu An <siyua@chromium.org>
Cr-Commit-Position: refs/heads/master@{#715047}

chrome/browser/ui/browser_commands.cc

@@ -959,11 +959,11 @@ void MaybeShowSaveLocalCardSignInPromo(Browser* browser) {
 void CloseSaveLocalCardSignInPromo(Browser* browser) {
   WebContents* web_contents =
       browser->tab_strip_model()->GetActiveWebContents();
-  autofill::SaveCardBubbleControllerImpl::CreateForWebContents(web_contents);
   autofill::SaveCardBubbleControllerImpl* controller =
       autofill::SaveCardBubbleControllerImpl::FromWebContents(web_contents);
 
-  controller->HideBubbleForSignInPromo();
+  if (controller)
+    controller->HideBubbleForSignInPromo();
 }
 
 void Translate(Browser* browser) {