CacheStorage: Pass LegacyCacheStorageCacheMatch() priority argument.

This was an oversight in crrev.com/c/1884932 and effectively made the
CacheStorageHighPriorityMatch feature have no effect.

Bug: 1018920
Change-Id: Ib962f254c9204cdcde1c817cf7ecfa13360ac2e4
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1904125
Commit-Queue: Matt Falkenhagen <falken@chromium.org>
Reviewed-by: Matt Falkenhagen <falken@chromium.org>
Cr-Commit-Position: refs/heads/master@{#713676}

content/browser/cache_storage/legacy/legacy_cache_storage_cache.cc

@@ -534,10 +534,9 @@ void LegacyCacheStorageCache::Match(
   }
 
   auto id = scheduler_->CreateId();
-  // TODO: use priority
   scheduler_->ScheduleOperation(
       id, CacheStorageSchedulerMode::kShared, CacheStorageSchedulerOp::kMatch,
-      CacheStorageSchedulerPriority::kNormal,
+      priority,
       base::BindOnce(
           &LegacyCacheStorageCache::MatchImpl, weak_ptr_factory_.GetWeakPtr(),
           std::move(request), std::move(match_options), trace_id,