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

chrome/browser/engagement/site_engagement_eviction_policy.h

Index: chrome/browser/engagement/site_engagement_eviction_policy.h
diff --git a/chrome/browser/engagement/site_engagement_eviction_policy.h b/chrome/browser/engagement/site_engagement_eviction_policy.h
new file mode 100644
index 0000000000000000000000000000000000000000..42664497be6fcf2731b31f33483284e727a4ab9e
--- /dev/null
+++ b/chrome/browser/engagement/site_engagement_eviction_policy.h
@@ -0,0 +1,56 @@
+// Copyright 2015 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 CHROME_BROWSER_ENGAGEMENT_SITE_ENGAGEMENT_EVICTION_POLICY_H_
+#define CHROME_BROWSER_ENGAGEMENT_SITE_ENGAGEMENT_EVICTION_POLICY_H_
+
+#include <stdint.h>
+
+#include <map>
+#include <memory>
+
+#include "base/macros.h"
+#include "base/memory/ref_counted.h"
+#include "storage/browser/quota/quota_manager.h"
+#include "url/gurl.h"
+
+namespace content {
+class BrowserContext;
+}
+
+class SiteEngagementScoreProvider;
+
+class SiteEngagementEvictionPolicy : public storage::QuotaEvictionPolicy {
+ public:
+  static bool IsEnabled();
+
+  explicit SiteEngagementEvictionPolicy(
+      content::BrowserContext* browser_context);
+  ~SiteEngagementEvictionPolicy() override;
+
+  // Overridden from storage::QuotaEvictionPolicy:
+  void GetEvictionOrigin(const scoped_refptr<storage::SpecialStoragePolicy>&
+                             special_storage_policy,
+                         const std::set<GURL>& exceptions,
+                         const std::map<GURL, int64_t>& usage_map,
+                         int64_t global_quota,
+                         const storage::GetOriginCallback& callback) override;
+
+ private:
+  friend class SiteEngagementEvictionPolicyTest;
+
+  static GURL CalculateEvictionOriginForTests(
+      const scoped_refptr<storage::SpecialStoragePolicy>&
+          special_storage_policy,
+      SiteEngagementScoreProvider* score_provider,
+      const std::set<GURL>& exceptions,
+      const std::map<GURL, int64_t>& usage_map,
+      int64_t global_quota);
+
+  content::BrowserContext* const browser_context_;
+
+  DISALLOW_COPY_AND_ASSIGN(SiteEngagementEvictionPolicy);
+};
+
+#endif  // CHROME_BROWSER_ENGAGEMENT_SITE_ENGAGEMENT_EVICTION_POLICY_H_