components: force relative ordering of unsequenced statements

In

```
void foo(std::unique_ptr<Bar> x) {
  x->run(std::move(x));
}
```

The order in which `x->run` is 'evaluated' is unsequenced with the
`move` out of `x` into a param. Force the intended order here by
grabbing the intended pointer in a prior statement.

Bug: None
Change-Id: Iab0af546c6f0640dfc6977256d7a6a55277dbbf0
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2202971Reviewed-by: Rachel Blum <groby@chromium.org>
Commit-Queue: George Burgess <gbiv@chromium.org>
Cr-Commit-Position: refs/heads/master@{#778967}

components/translate/content/browser/per_frame_content_translate_driver.cc

@@ -377,7 +377,9 @@ void PerFrameContentTranslateDriver::OnPageContents(
   // Run language detection of contents in a sandboxed utility process.
   mojo::Remote<language_detection::mojom::LanguageDetectionService> service =
       language_detection::LaunchLanguageDetectionService();
-  service->DetermineLanguage(
+  // Ensure that we call `service.get()` _before_ moving out of `service` below.
+  auto* raw_service = service.get();
+  raw_service->DetermineLanguage(
       contents,
       base::BindOnce(&PerFrameContentTranslateDriver::OnPageContentsLanguage,
                      weak_pointer_factory_.GetWeakPtr(), std::move(service)));