Introduce SuppressedHTTPSFormFetcher.

components/password_manager/content/browser/credential_manager_impl.cc

Index: components/password_manager/content/browser/credential_manager_impl.cc
diff --git a/components/password_manager/content/browser/credential_manager_impl.cc b/components/password_manager/content/browser/credential_manager_impl.cc
index 2b93023d44a65918ded02bf99e64eea2523aaea4..ca08d69633dc7bd3c913351401b1c8bdd2d111bc 100644
--- a/components/password_manager/content/browser/credential_manager_impl.cc
+++ b/components/password_manager/content/browser/credential_manager_impl.cc
@@ -79,9 +79,11 @@ void CredentialManagerImpl::Store(const CredentialInfo& credential,
 
   std::unique_ptr<autofill::PasswordForm> observed_form =
       CreateObservedPasswordFormFromOrigin(origin);
-  // Create a custom form fetcher with suppressed HTTP->HTTPS migration.
+  // Create a custom form fetcher without HTTP->HTTPS migration, as well as
+  // without fetching of suppressed HTTPS credentials on HTTP origins as the API
+  // is only available on HTTPS origins.
   auto form_fetcher = base::MakeUnique<FormFetcherImpl>(
-      PasswordStore::FormDigest(*observed_form), client_, false);
+      PasswordStore::FormDigest(*observed_form), client_, false, false);
   form_manager_ = base::MakeUnique<CredentialManagerPasswordFormManager>(
       client_, GetDriver(), *observed_form, std::move(form), this, nullptr,
       std::move(form_fetcher));