Not creating ClientUsageTracker for unsupported storage type.

webkit/browser/quota/usage_tracker.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 "webkit/browser/quota/usage_tracker.h"
 
 #include <algorithm>
 #include <deque>
 #include <set>
 #include <string>
@@ skipping 60 matching lines @@
 // UsageTracker ----------------------------------------------------------
 
 UsageTracker::UsageTracker(const QuotaClientList& clients,
                            StorageType type,
                            SpecialStoragePolicy* special_storage_policy)
     : type_(type),
       weak_factory_(this) {
   for (QuotaClientList::const_iterator iter = clients.begin();
       iter != clients.end();
       ++iter) {
-    client_tracker_map_[(*iter)->id()] =
-        new ClientUsageTracker(this, *iter, type, special_storage_policy);
+    if ((*iter)->DoesSupport(type)) {
+      client_tracker_map_[(*iter)->id()] =
+          new ClientUsageTracker(this, *iter, type, special_storage_policy);
+    }
   }
 }
 
 UsageTracker::~UsageTracker() {
   STLDeleteValues(&client_tracker_map_);
 }
 
 ClientUsageTracker* UsageTracker::GetClientTracker(QuotaClient::ID client_id) {
   ClientTrackerMap::iterator found = client_tracker_map_.find(client_id);
   if (found != client_tracker_map_.end())
@@ skipping 568 matching lines @@
 }
 
 bool ClientUsageTracker::IsStorageUnlimited(const GURL& origin) const {
   if (type_ == kStorageTypeSyncable)
     return false;
   return special_storage_policy_.get() &&
          special_storage_policy_->IsStorageUnlimited(origin);
 }
 
 }  // namespace quota