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

storage/browser/quota/quota_settings.h

-// Copyright 2016 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 STORAGE_BROWSER_QUOTA_QUOTA_SETTINGS_H_
-#define STORAGE_BROWSER_QUOTA_QUOTA_SETTINGS_H_
-
-#include <stdint.h>
-
-#include "base/callback.h"
-#include "base/files/file_path.h"
-#include "base/optional.h"
-#include "base/time/time.h"
-#include "storage/browser/storage_browser_export.h"
-
-namespace storage {
-
-// Settings the storage lib embedder must provide to the QuotaManager.
-struct QuotaSettings {
-  QuotaSettings() = default;
-  QuotaSettings(int64_t pool_size,
-                int64_t per_host_quota,
-                int64_t must_remain_available)
-      : pool_size(pool_size),
-        per_host_quota(per_host_quota),
-        must_remain_available(must_remain_available) {}
-
-  // The target size in bytes of the shared pool of disk space the quota
-  // system allows for use by websites using HTML5 storage apis, for
-  // example an embedder may use 50% of the total volume size.
-  int64_t pool_size = 0;
-
-  // The amount in bytes of the pool an individual site may consume. The
-  // value must be less than or equal to the pool_size.
-  int64_t per_host_quota = 0;
-
-  // The amount of space that must remain available on the storage
-  // volume. As the volume approaches this limit, the quota system gets
-  // more aggressive about evicting data and disallowing new data.
-  int64_t must_remain_available = 0;
-
-  // The quota system querries the embedder for the QuataSettings,
-  // but will rate limit the frequency of the querries to no more than once
-  // per refresh interval.
-  base::TimeDelta refresh_interval = base::TimeDelta::Max();
-};
-
-// Function type used to return the settings in response to a
-// GetQuotaSettingsFunc invocation. If the embedder cannot
-// produce a settings values, base::nullopt can be returned.
-using OptionalQuotaSettingsCallback =
-    base::Callback<void(base::Optional<QuotaSettings>)>;
-
-// Function type used to query the embedder about the quota manager settings.
-// This function is invoked on the UI thread.
-using GetQuotaSettingsFunc =
-    base::Callback<void(const OptionalQuotaSettingsCallback& callback)>;
-
-// Returns settings based on the size of the volume containing the storage
-// partition and a guestimate of the size required for the OS. The refresh
-// interval is 60 seconds to accomodate changes to the size of the volume.
-// Except, in the case of incognito, the poolize and quota values are based
-// on the amount of physical memory and the rerfresh interval is max'd out.
-STORAGE_EXPORT
-base::Optional<storage::QuotaSettings> CalculateNominalDynamicSettings(
-    const base::FilePath& partition_path,
-    bool is_incognito);
-
-// Returns settings with a poolsize of zero and no per host quota.
-inline QuotaSettings GetNoQuotaSettings() {
-  return QuotaSettings();
-}
-
-// Returns settings that provide given |per_host_quota| and a total poolsize of
-// five times that.
-inline QuotaSettings GetHardCodedSettings(int64_t per_host_quota) {
-  return QuotaSettings(per_host_quota * 5, per_host_quota, per_host_quota);
-}
-
-}  // namespace storage
-
-#endif  // STORAGE_BROWSER_QUOTA_QUOTA_MANAGER_H_