Compressed activity log database storage

chrome/browser/extensions/activity_log/activity_actions.h

 // Copyright (c) 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 CHROME_BROWSER_EXTENSIONS_ACTIVITY_LOG_ACTIVITY_ACTIONS_H_
 #define CHROME_BROWSER_EXTENSIONS_ACTIVITY_LOG_ACTIVITY_ACTIONS_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 85 matching lines @@
   // A dictionary where any additional data can be stored.
   const DictionaryValue* other() const { return other_.get(); }
   void set_other(scoped_ptr<DictionaryValue> other);
   DictionaryValue* mutable_other();
 
   // Flatten the activity's type-specific fields into an ExtensionActivity.
   scoped_ptr<api::activity_log_private::ExtensionActivity>
       ConvertToExtensionActivity();
 
   // Print an action as a regular string for debugging purposes.
-  std::string PrintForDebug();
+  virtual std::string PrintForDebug() const;
 
  protected:
   virtual ~Action();
 
  private:
   friend class base::RefCountedThreadSafe<Action>;
 
   std::string extension_id_;
   base::Time time_;
   api::activity_log_private::ExtensionActivity::ActivityType activity_type_;
   ActionType action_type_;
   std::string api_name_;
   scoped_ptr<ListValue> args_;
   GURL page_url_;
   std::string page_title_;
   bool page_incognito_;
   GURL arg_url_;
   bool arg_incognito_;
   scoped_ptr<DictionaryValue> other_;
 
   DISALLOW_COPY_AND_ASSIGN(Action);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_ACTIVITY_LOG_ACTIVITY_ACTIONS_H_