Add functions to clean URLs from the activity log

chrome/browser/extensions/activity_log/activity_log_policy.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 CHROME_BROWSER_EXTENSIONS_ACTIVITY_LOG_ACTIVITY_LOG_POLICY_H_
 #define CHROME_BROWSER_EXTENSIONS_ACTIVITY_LOG_ACTIVITY_LOG_POLICY_H_
 
 #include <set>
 #include <string>
 
@@ skipping 21 matching lines @@
 
 // An abstract class for processing and summarizing activity log data.
 // Subclasses will generally store data in an SQLite database (the
 // ActivityLogDatabasePolicy subclass includes some helper methods to assist
 // with this case), but this is not absolutely required.
 //
 // Implementations should support:
 // (1) Receiving Actions to process, and summarizing, compression, and storing
 //     these as appropriate.
 // (2) Reading Actions back from storage.
+// (3) Cleaning of URLs
 //
 // Implementations based on a database should likely implement
 // ActivityDatabase::Delegate, which provides hooks on database events and
 // allows the database to periodically request that actions (which the policy
 // is responsible for queueing) be flushed to storage.
 //
 // Since every policy implementation might summarize data differently, the
 // database implementation is policy-specific and therefore completely
 // encapsulated in the policy class.  All the member functions can be called
 // on the UI thread.
@@ skipping 39 matching lines @@
   // Gets all actions that match the specified fields. URLs are treated like
   // prefixes; other fields are exact matches. Empty strings are not matched to
   // anything.
   virtual void ReadFilteredData(
       const std::string& extension_id,
       const Action::ActionType type,
       const std::string& api_name,
       const std::string& page_url,
       const std::string& arg_url,
       const base::Callback
-          <void(scoped_ptr<Action::ActionVector>)>& callback) = 0;
+         <void(scoped_ptr<Action::ActionVector>)>& callback) = 0;
+
+  // Clean the relevant URL data. The cleaning may need to be different for
+  // different policies. If restrict_urls is empty then all URLs are removed.
+  virtual void RemoveURLs(const std::vector<GURL>& restrict_urls) = 0;
 
   // For unit testing only.
   void SetClockForTesting(scoped_ptr<base::Clock> clock);
 
   // A collection of methods that are useful for implementing policies.  These
   // are all static methods; the ActivityLogPolicy::Util class cannot be
   // instantiated.  This is nested within ActivityLogPolicy to make calling
   // these methods more convenient from within a policy, but they are public.
   class Util {
    public:
@@ skipping 105 matching lines @@
 
  private:
   // See the comments for the ActivityDatabase class for a discussion of how
   // database cleanup runs.
   ActivityDatabase* db_;
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_ACTIVITY_LOG_ACTIVITY_LOG_POLICY_H_