Do not fill credentials if the page url is not trusted.

Bug: 1014583
Change-Id: I687791397584b780d46b7674abe337a0fb72d5b2
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1899780Reviewed-by: Vasilii Sukhanov <vasilii@chromium.org>
Commit-Queue: Vadym Doroshenko <dvadym@chromium.org>
Cr-Commit-Position: refs/heads/master@{#712613}

ios/chrome/browser/passwords/password_controller.mm

@@ -335,6 +335,8 @@ NSString* const kSuggestionSuffix = @" ••••••••";
                                   webState:(web::WebState*)webState
                          completionHandler:
                              (SuggestionsAvailableCompletion)completion {
+  if (!GetPageURLAndCheckTrustLevel(webState, nullptr))
+    return;
   [self.suggestionHelper
       checkIfSuggestionsAvailableForForm:formName
                          fieldIdentifier:fieldIdentifier
@@ -385,7 +387,8 @@ NSString* const kSuggestionSuffix = @" ••••••••";
                            frameID:(NSString*)frameID
                           webState:(web::WebState*)webState
                  completionHandler:(SuggestionsReadyCompletion)completion {
-  DCHECK(GetPageURLAndCheckTrustLevel(webState, nullptr));
+  if (!GetPageURLAndCheckTrustLevel(webState, nullptr))
+    return;
   NSArray<FormSuggestion*>* rawSuggestions =
       [self.suggestionHelper retrieveSuggestionsWithFormName:formName
                                              fieldIdentifier:fieldIdentifier