Add daily quota for precache

components/precache/core/precache_database.h

 // 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.
 
 #ifndef COMPONENTS_PRECACHE_CORE_PRECACHE_DATABASE_H_
 #define COMPONENTS_PRECACHE_CORE_PRECACHE_DATABASE_H_
 
 #include <stdint.h>
 
 #include <memory>
@@ skipping 97 matching lines @@
   std::unique_ptr<PrecacheUnfinishedWork> GetUnfinishedWork();
 
   // Stores the state required to continue a precache session so that the
   // session can be resumed later.
   void SaveUnfinishedWork(
       std::unique_ptr<PrecacheUnfinishedWork> unfinished_work);
 
   // Deletes unfinished work from the database.
   void DeleteUnfinishedWork();
 
+  // Precache quota.
+  void SaveQuota(const PrecacheQuota& quota);
+  PrecacheQuota GetQuota();
+
   base::WeakPtr<PrecacheDatabase> GetWeakPtr();
 
  private:
   friend class PrecacheDatabaseTest;
 
   bool IsDatabaseAccessible() const;
 
   // Flushes any buffered write operations. |buffered_writes_| will be empty
   // after calling this function. To maximize performance, all the buffered
   // writes are run in a single database transaction.
@@ skipping 56 matching lines @@
 
   // This must be the last member of this class.
   base::WeakPtrFactory<PrecacheDatabase> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(PrecacheDatabase);
 };
 
 }  // namespace precache
 
 #endif  // COMPONENTS_PRECACHE_CORE_PRECACHE_DATABASE_H_