Add functions to clean URLs from the activity log

chrome/browser/extensions/activity_log/counting_policy.h

Index: chrome/browser/extensions/activity_log/counting_policy.h
diff --git a/chrome/browser/extensions/activity_log/counting_policy.h b/chrome/browser/extensions/activity_log/counting_policy.h
index 2f7b36146bf778faff8492e0ecfba318b3356ad7..b48dd628ff53d95cfc1af4f8073b769b344d1479 100644
--- a/chrome/browser/extensions/activity_log/counting_policy.h
+++ b/chrome/browser/extensions/activity_log/counting_policy.h
@@ -45,6 +45,9 @@ class CountingPolicy : public ActivityLogDatabasePolicy {
     retention_time_ = delta;
   }
 
+  // Clean the URL data stored for this policy.
+  virtual void RemoveURLs(const std::vector<GURL>&) OVERRIDE;
+
   // The main database table, and the name for a read-only view that
   // decompresses string values for easier parsing.
   static const char* kTableName;
@@ -84,6 +87,10 @@ class CountingPolicy : public ActivityLogDatabasePolicy {
       const std::string& page_url,
       const std::string& arg_url);
 
+  // The implementation of RemoveURLs; this must only run on the database
+  // thread.
+  void DoRemoveURLs(const std::vector<GURL>& restrict_urls);
+
   // Cleans old records from the activity log database.
   bool CleanOlderThan(sql::Connection* db, const base::Time& cutoff);