Implement sql::Connection::RazeAndClose().

chrome/browser/extensions/activity_database.h

Index: chrome/browser/extensions/activity_database.h
diff --git a/chrome/browser/extensions/activity_database.h b/chrome/browser/extensions/activity_database.h
index 1c73dc9709cb98b55dac1ec01ac57d32d9a52907..02bdf5468f50db71243ea39658abb634f1404535 100644
--- a/chrome/browser/extensions/activity_database.h
+++ b/chrome/browser/extensions/activity_database.h
@@ -47,6 +47,9 @@ class ActivityDatabase : public base::RefCountedThreadSafe<ActivityDatabase> {
   // Record an Action in the database.
   void RecordAction(scoped_refptr<Action> action);
 
+  // Break any outstanding transactions, raze the database, and close
+  // it.  Future calls on the current database handle will fail, when
+  // next opened the database will be empty.
   void KillDatabase();
 
   bool initialized() const { return initialized_; }