Fix "Mac Clang (dbg)" build

webkit/quota/mock_quota_manager_unittest.cc

 // 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.
 
 
 #include <set>
 
 #include "base/file_util.h"
 #include "base/memory/scoped_callback_factory.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 66 matching lines @@
   }
 
   MockQuotaManager* manager() const {
     return manager_.get();
   }
 
   const std::set<GURL>& origins() const {
     return origins_;
   }
 
-  const StorageType type() const {
+  const StorageType& type() const {
     return type_;
   }
 
  private:
   ScopedTempDir data_dir_;
   base::ScopedCallbackFactory<MockQuotaManagerTest> callback_factory_;
   scoped_refptr<MockQuotaManager> manager_;
   scoped_refptr<MockSpecialStoragePolicy> policy_;
 
   int deletion_callback_count_;
@@ skipping 73 matching lines @@
 
   GetModifiedOrigins(kStorageTypeTemporary, now - a_minute);
   MessageLoop::current()->RunAllPending();
 
   EXPECT_EQ(kStorageTypeTemporary, type());
   EXPECT_EQ(1UL, origins().size());
   EXPECT_EQ(0UL, origins().count(kOrigin1));
   EXPECT_EQ(1UL, origins().count(kOrigin2));
 }
 }  // Namespace quota