Switch SupportsUserData uses to use unique_ptr.

ios/chrome/browser/web/network_activity_indicator_tab_helper.mm

Index: ios/chrome/browser/web/network_activity_indicator_tab_helper.mm
diff --git a/ios/chrome/browser/web/network_activity_indicator_tab_helper.mm b/ios/chrome/browser/web/network_activity_indicator_tab_helper.mm
index 0d6635d591465f38dd82f0b8f93353ddc8d9f1a3..2d2e89f125805534c7e9ac9ad7ddc5a246aa5a81 100644
--- a/ios/chrome/browser/web/network_activity_indicator_tab_helper.mm
+++ b/ios/chrome/browser/web/network_activity_indicator_tab_helper.mm
@@ -4,6 +4,7 @@
 
 #import "ios/chrome/browser/web/network_activity_indicator_tab_helper.h"
 
+#include "base/memory/ptr_util.h"
 #import "ios/chrome/browser/ui/network_activity_indicator_manager.h"
 #import "ios/web/public/web_state/web_state.h"
 
@@ -15,8 +16,9 @@ void NetworkActivityIndicatorTabHelper::CreateForWebState(
     NSString* tab_id) {
   DCHECK(web_state);
   if (!FromWebState(web_state)) {
-    web_state->SetUserData(UserDataKey(), new NetworkActivityIndicatorTabHelper(
-                                              web_state, tab_id));
+    web_state->SetUserData(
+        UserDataKey(), base::WrapUnique(new NetworkActivityIndicatorTabHelper(
+                           web_state, tab_id)));
   }
 }