Add a using declaration for Timer::Start in BaseTimerMethodPointer.

base/timer.h

Index: base/timer.h
diff --git a/base/timer.h b/base/timer.h
index 28c0a10da1902adde138b20c444966cda4fd69e8..95cae12b1d455a255e21ebe968df1d4763c0b84d 100644
--- a/base/timer.h
+++ b/base/timer.h
@@ -184,6 +184,13 @@ class BaseTimerMethodPointer : public Timer {
  public:
   typedef void (Receiver::*ReceiverMethod)();
 
+  // This is here to work around the fact that Timer::Start is "hidden" by the
+  // Start definition below, rather than being overloaded.
+  // TODO(tim): We should remove uses of BaseTimerMethodPointer::Start below
+  // and convert callers to use the base::Closure version in Timer::Start,
+  // see bug 148832.
+  using Timer::Start;
+
   BaseTimerMethodPointer() : Timer(kIsRepeating, kIsRepeating) {}
 
   // Start the timer to run at the given |delay| from now. If the timer is