Minor cleanup to UsageTracker.IsWorking().

webkit/quota/quota_types.h

 // Copyright (c) 2011 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.
 
 #ifndef WEBKIT_QUOTA_QUOTA_TYPES_H_
 #define WEBKIT_QUOTA_QUOTA_TYPES_H_
 #pragma once
 
 #include <deque>
 #include <map>
@@ skipping 145 matching lines @@
   typedef typename CallbackMap::iterator iterator;
 
   bool Add(const KEY& key, CallbackType callback) {
     return callback_map_[key].Add(callback);
   }
 
   bool HasCallbacks(const KEY& key) const {
     return (callback_map_.find(key) != callback_map_.end());
   }
 
+  bool HasAnyCallbacks() const {
+    return !callback_map_.empty();
+  }
+
   iterator Begin() { return callback_map_.begin(); }
   iterator End() { return callback_map_.end(); }
 
   void Clear() { callback_map_.clear(); }
 
  protected:
   CallbackMap callback_map_;
 };
 
 template <typename CallbackType1, typename KEY, typename ARG>
@@ skipping 96 matching lines @@
                           const std::string&,
                           StorageType, int64> HostUsageCallbackMap;
 typedef CallbackQueueMap4<HostQuotaCallback*, std::string,
                           QuotaStatusCode,
                           const std::string&,
                           StorageType, int64> HostQuotaCallbackMap;
 
 }  // namespace quota
 
 #endif  // WEBKIT_QUOTA_QUOTA_TYPES_H_