Add access count and time-since-accessed histograms to temp storage eviction.

storage/browser/quota/quota_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 STORAGE_BROWSER_QUOTA_QUOTA_DATABASE_H_
 #define STORAGE_BROWSER_QUOTA_QUOTA_DATABASE_H_
 
 #include <set>
 #include <string>
 
@@ skipping 18 matching lines @@
 
 class GURL;
 
 namespace storage {
 
 class SpecialStoragePolicy;
 
 // All the methods of this class must run on the DB thread.
 class STORAGE_EXPORT_PRIVATE QuotaDatabase {
  public:
+  struct STORAGE_EXPORT_PRIVATE OriginInfoTableEntry {
+    OriginInfoTableEntry();
+    OriginInfoTableEntry(const GURL& origin,
+                         StorageType type,
+                         int used_count,
+                         const base::Time& last_access_time,
+                         const base::Time& last_modified_time);
+    GURL origin;
+    StorageType type;
+    int used_count;
+    base::Time last_access_time;
+    base::Time last_modified_time;
+  };
+
   // Constants for {Get,Set}QuotaConfigValue keys.
   static const char kDesiredAvailableSpaceKey[];
   static const char kTemporaryQuotaOverrideKey[];
 
   // If 'path' is empty, an in memory database will be used.
   explicit QuotaDatabase(const base::FilePath& path);
   ~QuotaDatabase();
 
   void CloseConnection();
 
+  // Returns whether the record could be found.
   bool GetHostQuota(const std::string& host, StorageType type, int64* quota);
+
+  // Returns whether the operation succeeded.
   bool SetHostQuota(const std::string& host, StorageType type, int64 quota);
   bool DeleteHostQuota(const std::string& host, StorageType type);
 
   bool SetOriginLastAccessTime(const GURL& origin,
                                StorageType type,
                                base::Time last_access_time);
 
   bool SetOriginLastModifiedTime(const GURL& origin,
                                  StorageType type,
                                  base::Time last_modified_time);
 
+  // Gets the time |origin| was last evicted. Returns whether the record could
+  // be found.
   bool GetOriginLastEvictionTime(const GURL& origin,
                                  StorageType type,
                                  base::Time* last_eviction_time);
+
+  // Sets the time the origin was last evicted. Returns whether the operation
+  // succeeded.
   bool SetOriginLastEvictionTime(const GURL& origin,
                                  StorageType type,
                                  base::Time last_eviction_time);
   bool DeleteOriginLastEvictionTime(const GURL& origin, StorageType type);
 
   // Register initial |origins| info |type| to the database.
   // This method is assumed to be called only after the installation or
   // the database schema reset.
   bool RegisterInitialOriginInfo(
       const std::set<GURL>& origins, StorageType type);
 
+  // Gets the OriginInfoTableEntry for |origin|. Returns whether the record
+  // could be found.
+  bool GetOriginInfo(const GURL& origin,
+                     StorageType type,
+                     OriginInfoTableEntry* entry);
+
   bool DeleteOriginInfo(const GURL& origin, StorageType type);
 
   bool GetQuotaConfigValue(const char* key, int64* value);
   bool SetQuotaConfigValue(const char* key, int64 value);
 
   // Sets |origin| to the least recently used origin of origins not included
   // in |exceptions| and not granted the special unlimited storage right.
   // It returns false when it failed in accessing the database.
   // |origin| is set to empty when there is no matching origin.
   bool GetLRUOrigin(StorageType type,
                     const std::set<GURL>& exceptions,
                     SpecialStoragePolicy* special_storage_policy,
                     GURL* origin);
 
   // Populates |origins| with the ones that have been modified since
-  // the |modified_since|.
+  // the |modified_since|. Returns whether the operation succeeded.
   bool GetOriginsModifiedSince(StorageType type,
                                std::set<GURL>* origins,
                                base::Time modified_since);
 
   // Returns false if SetOriginDatabaseBootstrapped has never
   // been called before, which means existing origins may not have been
   // registered.
   bool IsOriginDatabaseBootstrapped();
   bool SetOriginDatabaseBootstrapped(bool bootstrap_flag);
 
  private:
   struct STORAGE_EXPORT_PRIVATE QuotaTableEntry {
     QuotaTableEntry();
     QuotaTableEntry(
         const std::string& host,
         StorageType type,
         int64 quota);
     std::string host;
     StorageType type;
     int64 quota;
   };
   friend STORAGE_EXPORT_PRIVATE bool operator <(
       const QuotaTableEntry& lhs, const QuotaTableEntry& rhs);
-
-  struct STORAGE_EXPORT_PRIVATE OriginInfoTableEntry {
-    OriginInfoTableEntry();
-    OriginInfoTableEntry(
-        const GURL& origin,
-        StorageType type,
-        int used_count,
-        const base::Time& last_access_time,
-        const base::Time& last_modified_time);
-    GURL origin;
-    StorageType type;
-    int used_count;
-    base::Time last_access_time;
-    base::Time last_modified_time;
-  };
   friend STORAGE_EXPORT_PRIVATE bool operator <(
       const OriginInfoTableEntry& lhs, const OriginInfoTableEntry& rhs);
 
   // Structures used for CreateSchema.
   struct TableSchema {
     const char* table_name;
     const char* columns;
   };
   struct IndexSchema {
     const char* index_name;
@@ skipping 49 matching lines @@
 
   static const TableSchema kTables[];
   static const IndexSchema kIndexes[];
 
   DISALLOW_COPY_AND_ASSIGN(QuotaDatabase);
 };
 
 }  // namespace storage
 
 #endif  // STORAGE_BROWSER_QUOTA_QUOTA_DATABASE_H_