Fix use-after-move in //components/omnibox/browser/

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

Bug: 1122844
Change-Id: I4ea0a82440442e986e82a41206a0904223d2a858
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2382816Reviewed-by: Justin Donnelly <jdonnelly@chromium.org>
Commit-Queue: Maksim Ivanov <emaxx@chromium.org>
Cr-Commit-Position: refs/heads/master@{#803140}

components/omnibox/browser/clipboard_provider.cc

@@ -552,8 +552,10 @@ void ClipboardProvider::NewClipboardImageMatch(
 void ClipboardProvider::OnReceiveImage(
     ClipboardImageMatchCallback callback,
     base::Optional<gfx::Image> optional_image) {
-  if (!optional_image)
+  if (!optional_image) {
     std::move(callback).Run(base::nullopt);
+    return;
+  }
   gfx::ImageSkia image_skia = *optional_image.value().ToImageSkia();
   image_skia.MakeThreadSafe();
   base::ThreadPool::PostTaskAndReplyWithResult(