[SyncFS] Show if a tracker is demoted or not in chrome://syncfs-internals

chrome/browser/sync_file_system/drive_backend/metadata_database.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/sync_file_system/drive_backend/metadata_database.h"
 
 #include <algorithm>
 #include <stack>
 
 #include "base/bind.h"
@@ skipping 1620 matching lines @@
   return metadata.details().change_id() >= change_id;
 }
 
 scoped_ptr<base::ListValue> MetadataDatabase::DumpTrackers() {
   scoped_ptr<base::ListValue> trackers(new base::ListValue);
 
   // Append the first element for metadata.
   base::DictionaryValue* metadata = new base::DictionaryValue;
   const char *trackerKeys[] = {
     "tracker_id", "path", "file_id", "tracker_kind", "app_id",
-    "active", "dirty", "folder_listing",
+    "active", "dirty", "folder_listing", "demoted",
     "title", "kind", "md5", "etag", "missing", "change_id",
   };
   std::vector<std::string> key_strings(
       trackerKeys, trackerKeys + ARRAYSIZE_UNSAFE(trackerKeys));
   base::ListValue* keys = new base::ListValue;
   keys->AppendStrings(key_strings);
   metadata->SetString("title", "Trackers");
   metadata->Set("keys", keys);
   trackers->Append(metadata);
 
@@ skipping 18 matching lines @@
         "tracker_kind",
         tracker_kind == TRACKER_KIND_APP_ROOT ? "AppRoot" :
         tracker_kind == TRACKER_KIND_DISABLED_APP_ROOT ? "Disabled App" :
         tracker.tracker_id() == GetSyncRootTrackerID() ? "SyncRoot" :
         "Regular");
     dict->SetString("app_id", tracker.app_id());
     dict->SetString("active", tracker.active() ? "true" : "false");
     dict->SetString("dirty", tracker.dirty() ? "true" : "false");
     dict->SetString("folder_listing",
                     tracker.needs_folder_listing() ? "needed" : "no");
+
+    bool is_demoted = index_->IsDemotedDirtyTracker(tracker.tracker_id());
+    dict->SetString("demoted", is_demoted ? "true" : "false");
     if (tracker.has_synced_details()) {
       const FileDetails& details = tracker.synced_details();
       dict->SetString("title", details.title());
       dict->SetString("kind", FileKindToString(details.file_kind()));
       dict->SetString("md5", details.md5());
       dict->SetString("etag", details.etag());
       dict->SetString("missing", details.missing() ? "true" : "false");
       dict->SetString("change_id", base::Int64ToString(details.change_id()));
     }
     trackers->Append(dict);
@@ skipping 101 matching lines @@
       return false;
 
   if (!parents.empty())
     return false;
 
   return true;
 }
 
 }  // namespace drive_backend
 }  // namespace sync_file_system