Revert of Change how the quota system computes the total poolsize for temporary storage

storage/browser/quota/client_usage_tracker.cc

 // Copyright 2014 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 "storage/browser/quota/client_usage_tracker.h"
 
 #include <stdint.h>
 
 #include "base/bind.h"
 #include "base/stl_util.h"
@@ skipping 147 matching lines @@
       storage_monitor_->NotifyUsageChange(filter, delta);
     }
     return;
   }
 
   // We don't know about this host yet, so populate our cache for it.
   GetHostUsage(host, base::Bind(&ClientUsageTracker::DidGetHostUsageAfterUpdate,
                                 AsWeakPtr(), origin));
 }
 
-int64_t ClientUsageTracker::GetCachedUsage() const {
-  int64_t usage = 0;
-  for (const auto& host_and_usage_map : cached_usage_by_host_) {
-    for (const auto& origin_and_usage : host_and_usage_map.second)
-      usage += origin_and_usage.second;
-  }
-  return usage;
-}
-
 void ClientUsageTracker::GetCachedHostsUsage(
     std::map<std::string, int64_t>* host_usage) const {
   DCHECK(host_usage);
   for (const auto& host_and_usage_map : cached_usage_by_host_) {
     const std::string& host = host_and_usage_map.first;
     (*host_usage)[host] += GetCachedHostUsage(host);
   }
 }
 
 void ClientUsageTracker::GetCachedOriginsUsage(
@@ skipping 282 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 storage