Not creating ClientUsageTracker for unsupported storage type.

webkit/browser/quota/usage_tracker_unittest.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 "base/bind.h"
 #include "base/message_loop/message_loop.h"
 #include "net/base/net_util.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "webkit/browser/quota/mock_special_storage_policy.h"
 #include "webkit/browser/quota/usage_tracker.h"
@@ skipping 71 matching lines @@
 
   virtual void DeleteOriginData(const GURL& origin,
                                 StorageType type,
                                 const DeletionCallback& callback) OVERRIDE {
     EXPECT_EQ(kStorageTypeTemporary, type);
     usage_map_.erase(origin);
     base::MessageLoop::current()->PostTask(
         FROM_HERE, base::Bind(callback, kQuotaStatusOk));
   }
 
+  virtual bool DoesSupport(quota::StorageType type) const OVERRIDE {
+    return type == quota::kStorageTypeTemporary;
+  }
+
   int64 GetUsage(const GURL& origin) {
     UsageMap::const_iterator found = usage_map_.find(origin);
     if (found == usage_map_.end())
       return 0;
     return found->second;
   }
 
   void SetUsage(const GURL& origin, int64 usage) {
     usage_map_[origin] = usage;
   }
@@ skipping 213 matching lines @@
 
   GetGlobalLimitedUsage(&limited_usage);
   GetGlobalUsage(&total_usage, &unlimited_usage);
   EXPECT_EQ(1 + 16, limited_usage);
   EXPECT_EQ(1 + 2 + 16 + 32, total_usage);
   EXPECT_EQ(2 + 32, unlimited_usage);
 }
 
 
 }  // namespace quota