Remove `kMockStart` from `quota::MockStorageClient`

webkit/quota/quota_client.h

 // Copyright (c) 2012 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_CLIENT_H_
 #define WEBKIT_QUOTA_QUOTA_CLIENT_H_
 
 #include <list>
 #include <set>
 #include <string>
@@ skipping 17 matching lines @@
   typedef base::Callback<void(QuotaStatusCode)> DeletionCallback;
 
   virtual ~QuotaClient() {}
 
   enum ID {
     kUnknown = 1 << 0,
     kFileSystem = 1 << 1,
     kDatabase = 1 << 2,
     kAppcache = 1 << 3,
     kIndexedDatabase = 1 << 4,
-    kMockStart = 1 << 5,  // This needs to be the end of the enum.
   };
 
   static const int kAllClientsMask = -1;
 
   virtual ID id() const = 0;
 
   // Called when the quota manager is destroyed.
   virtual void OnQuotaManagerDestroyed() = 0;
 
   // Called by the QuotaManager.
@@ skipping 19 matching lines @@
                                 StorageType type,
                                 const DeletionCallback& callback) = 0;
 };
 
 // TODO(dmikurube): Replace it to std::vector for efficiency.
 typedef std::list<QuotaClient*> QuotaClientList;
 
 }  // namespace quota
 
 #endif  // WEBKIT_QUOTA_QUOTA_CLIENT_H_