Fix use-after-move in //components/payments/content/

Fix use-after-move (potential) bugs found by the
"bugprone-use-after-move" clang-tidy check.

Bug: 1122844
Change-Id: I8efb8969075297d3ac604ad90f80c26f49fee8c4
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2431967
Commit-Queue: Rouslan Solomakhin <rouslan@chromium.org>
Reviewed-by: Rouslan Solomakhin <rouslan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#810931}

components/payments/content/payment_credential.cc

@@ -58,9 +58,10 @@ void PaymentCredential::StorePaymentCredential(
     return;
   }
 
+  const GURL icon_url = instrument->icon;
   int request_id = web_contents()->DownloadImageInFrame(
       initiator_frame_routing_id_,
-      instrument->icon,  // source URL
+      icon_url,  // source URL
       true,      // is_favicon
       0,         // no preferred size
       0,         // no max size

components/payments/content/secure_payment_confirmation_app_factory.cc

@@ -130,8 +130,9 @@ void SecurePaymentConfirmationAppFactory::Create(
 
       std::unique_ptr<autofill::InternalAuthenticator> authenticator =
           delegate->CreateInternalAuthenticator();
+      auto* authenticator_ptr = authenticator.get();
 
-      authenticator->IsUserVerifyingPlatformAuthenticatorAvailable(
+      authenticator_ptr->IsUserVerifyingPlatformAuthenticatorAvailable(
           base::BindOnce(&SecurePaymentConfirmationAppFactory::
                              OnIsUserVerifyingPlatformAuthenticatorAvailable,
                          weak_ptr_factory_.GetWeakPtr(), delegate,