[Activity Log] when extension is uninstalled, delete data about it

chrome/browser/extensions/activity_log/fullstream_ui_policy.h

Index: chrome/browser/extensions/activity_log/fullstream_ui_policy.h
diff --git a/chrome/browser/extensions/activity_log/fullstream_ui_policy.h b/chrome/browser/extensions/activity_log/fullstream_ui_policy.h
index b7b137c7c45dafd87a15138901a3e92751d35069..a0d0b9a08e201087557cdbd05e8e02102c555d96 100644
--- a/chrome/browser/extensions/activity_log/fullstream_ui_policy.h
+++ b/chrome/browser/extensions/activity_log/fullstream_ui_policy.h
@@ -43,6 +43,9 @@ class FullStreamUIPolicy : public ActivityLogDatabasePolicy {
   // Clean the URL data stored for this policy.
   virtual void RemoveURLs(const std::vector<GURL>& restrict_urls) OVERRIDE;
 
+  // Clean the data related to this extension for this policy.
+  virtual void RemoveExtensionData(const std::string& extension_id) OVERRIDE;
+
   // Delete everything in the database.
   virtual void DeleteDatabase() OVERRIDE;
 
@@ -74,6 +77,10 @@ class FullStreamUIPolicy : public ActivityLogDatabasePolicy {
   // thread.
   void DoRemoveURLs(const std::vector<GURL>& restrict_urls);
 
+  // The implementation of RemoveExtensionData; this must only run on the
+  // database thread.
+  void DoRemoveExtensionData(const std::string& extension_id);
+
   // The implementation of DeleteDatabase; this must only run on the database
   // thread.
   void DoDeleteDatabase();