[Extensions UI] Check for a browser not being found

chrome/browser/ui/extensions/settings_api_bubble_helpers.cc

Index: chrome/browser/ui/extensions/settings_api_bubble_helpers.cc
diff --git a/chrome/browser/ui/extensions/settings_api_bubble_helpers.cc b/chrome/browser/ui/extensions/settings_api_bubble_helpers.cc
index 0a11041815bdf9248d90ce859c77160cd6a0d26f..354248c59a2f1b9116b0369ed00f9256684961cb 100644
--- a/chrome/browser/ui/extensions/settings_api_bubble_helpers.cc
+++ b/chrome/browser/ui/extensions/settings_api_bubble_helpers.cc
@@ -65,7 +65,8 @@ void MaybeShowExtensionControlledSearchNotification(
   if (AutocompleteMatch::IsSearchType(match_type) &&
       match_type != AutocompleteMatchType::SEARCH_OTHER_ENGINE) {
     Browser* browser = chrome::FindBrowserWithWebContents(web_contents);
-    ShowSettingsApiBubble(BUBBLE_TYPE_SEARCH_ENGINE, browser);
+    if (browser)
+      ShowSettingsApiBubble(BUBBLE_TYPE_SEARCH_ENGINE, browser);
   }
 }