[Files ranking] Add additional VLOGs for debugging.

Bug: 1011221
Change-Id: Ifa69d148a1a0e9080589554ccbe4f76817710ec3
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1909058Reviewed-by: Thanh Nguyen <thanhdng@chromium.org>
Commit-Queue: Tony Yeoman <tby@chromium.org>
Cr-Commit-Position: refs/heads/master@{#714304}

chrome/browser/ui/app_list/search/search_result_ranker/search_result_ranker.cc

@@ -585,12 +585,26 @@ void SearchResultRanker::OverrideZeroStateResults(
     if (candidate_override_index == -1)
       continue;
 
+    // TODO(crbug.com/1011221): Remove once the bug re. zero-state drive files
+    // not being shown is resolved.
+    VLOG(1) << "Zero state files override: newtype=" << static_cast<int>(group)
+            << " newpos=" << next_modifiable_index;
     // Override the result at |next_modifiable_index| with
     // |candidate_override_index| by swapping their scores.
     std::swap(result_ptrs[candidate_override_index]->score,
               result_ptrs[next_modifiable_index]->score);
     --next_modifiable_index;
   }
+
+  // TODO(crbug.com/1011221): Remove once the bug re. zero-state drive files not
+  // being shown is resolved.
+  VLOG(1) << "Zero state files setting result scores";
+  for (const auto* result : result_ptrs) {
+    VLOG(1) << "Zero state files result score: type="
+            << static_cast<int>(
+                   RankingItemTypeFromSearchResult(*(result->result)))
+            << " score=" << result->score;
+  }
 }
 
 void SearchResultRanker::OnFilesOpened(