Log the Autofill Server cache key on matches as well as misses.

For Captured Sites test automation, we now log what is in the cache,
and we log the key that was looked for on a miss, but we don't log
what key was requested when there is a hit. This line fixes that.

Change-Id: I01561dd39d7152f87b66bb9d1a993dbe2d94b33f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1748604Reviewed-by: Maxim Kolosovskiy <kolos@chromium.org>
Commit-Queue: Ian Struiksma <ianstruiksma@google.com>
Cr-Commit-Position: refs/heads/master@{#686479}

chrome/browser/autofill/automated_tests/cache_replayer.cc

@@ -526,6 +526,7 @@ bool ServerCacheReplayer::GetResponseForQuery(
     VLOG(1) << "Did not match any response for " << key;
     return false;
   }
+  VLOG(1) << "Retrieving response for " << key;
   std::string decompressed_http_response;
   // Safe to use at() here since we looked for key's presence and there is no
   // mutation done when there is concurrency.