Fix use-after-move in //c/b/thumbnail/generator/android/

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

Bug: 1122844
Change-Id: I6fbd3686d8993bdd75fe25f5849f8da39bc87550
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2562183
Commit-Queue: David Trainor <dtrainor@chromium.org>
Auto-Submit: Maksim Ivanov <emaxx@chromium.org>
Reviewed-by: Xing Liu <xingliu@chromium.org>
Reviewed-by: David Trainor <dtrainor@chromium.org>
Cr-Commit-Position: refs/heads/master@{#832624}

chrome/browser/thumbnail/generator/android/thumbnail_generator.cc

@@ -107,10 +107,11 @@ void ThumbnailGenerator::RetrieveThumbnail(
   if (base::StartsWith(mime_type, "video/",
                        base::CompareCase::INSENSITIVE_ASCII)) {
     auto parser = ThumbnailMediaParser::Create(mime_type, file_path);
-    parser->Start(base::BindOnce(&ThumbnailGenerator::OnVideoThumbnailRetrieved,
-                                 weak_factory_.GetWeakPtr(),
-                                 std::move(java_callback), icon_size,
-                                 std::move(parser)));
+    auto* const parser_ptr = parser.get();
+    parser_ptr->Start(
+        base::BindOnce(&ThumbnailGenerator::OnVideoThumbnailRetrieved,
+                       weak_factory_.GetWeakPtr(), std::move(java_callback),
+                       icon_size, std::move(parser)));
     return;
   }