Add functions to clean URLs from the activity log

chrome/browser/extensions/activity_log/activity_log.h

Index: chrome/browser/extensions/activity_log/activity_log.h
diff --git a/chrome/browser/extensions/activity_log/activity_log.h b/chrome/browser/extensions/activity_log/activity_log.h
index 2a4e491b266ffca100f0af4f15a748b460138e8e..adb956f8311cd3ed38021290c644421401b6acf9 100644
--- a/chrome/browser/extensions/activity_log/activity_log.h
+++ b/chrome/browser/extensions/activity_log/activity_log.h
@@ -145,6 +145,12 @@ class ActivityLog : public BrowserContextKeyedService,
   // BrowserContextKeyedService
   virtual void Shutdown() OVERRIDE;
 
+  // Clean up URLs from the activity log database.
+  // If gurls is empty then all URLs in the activity log database are removed.
+  virtual void RemoveURLs(const std::vector<GURL>& gurls);
+  virtual void RemoveURLs(const std::set<GURL>& gurls);
+  virtual void RemoveURL(const GURL& gurl);
+
  private:
   friend class ActivityLogFactory;
   friend class ActivityLogTest;