Password bubble: Ensure that the bubble stays open for at least 1 second.

base/timer/elapsed_timer.h

Index: base/timer/elapsed_timer.h
diff --git a/base/timer/elapsed_timer.h b/base/timer/elapsed_timer.h
index 3ea2bfadf381f21a625b9fca832b52adf9ca5fec..1cb9f1193d8e918299692987430e2dd1ab8474c6 100644
--- a/base/timer/elapsed_timer.h
+++ b/base/timer/elapsed_timer.h
@@ -15,9 +15,10 @@ namespace base {
 class BASE_EXPORT ElapsedTimer {
  public:
   ElapsedTimer();
+  virtual ~ElapsedTimer() {}
 
   // Returns the time elapsed since object construction.
-  TimeDelta Elapsed() const;
+  virtual TimeDelta Elapsed() const;
 
  private:
   TimeTicks begin_;