Trace how long it took to create bloom filter in H2CacheImpl

Release-Notes: skip
Change-Id: I43c8b9a738b3212373920aa2b1f00a1be05fcc9e

java/com/google/gerrit/server/cache/h2/H2CacheImpl.java

diff --git a/java/com/google/gerrit/server/cache/h2/H2CacheImpl.java b/java/com/google/gerrit/server/cache/h2/H2CacheImpl.java
index 3a732d1..81f1e71 100644
--- a/java/com/google/gerrit/server/cache/h2/H2CacheImpl.java
+++ b/java/com/google/gerrit/server/cache/h2/H2CacheImpl.java
@@ -419,7 +419,7 @@
     @Nullable
     private BloomFilter<K> buildBloomFilter() {
       SqlHandle c = null;
-      try {
+      try (TraceTimer ignored = TraceContext.newTimer("Build bloom filter", Metadata.empty())) {
         c = acquire();
         if (estimatedSize <= 0) {
           try (PreparedStatement ps =