Change QuicWallTime to have microsecond granularity.

net/tools/quic/quic_epoll_clock.h

Index: net/tools/quic/quic_epoll_clock.h
diff --git a/net/tools/quic/quic_epoll_clock.h b/net/tools/quic/quic_epoll_clock.h
index c5a1390bd242aa1625edb3c3d9b927fe696286ee..12634c869b00c94c180af8e39bc3c903a9621feb 100644
--- a/net/tools/quic/quic_epoll_clock.h
+++ b/net/tools/quic/quic_epoll_clock.h
@@ -30,6 +30,10 @@ class QuicEpollClock : public QuicClock {
   // Note: this use significant resources please use only if needed.
   QuicTime Now() const override;
 
+  // Returns the current time as a QuicTime object.
+  // Note: this use significant resources please use only if needed.

[ramant (doing other things), 2015/11/03 00:33:10]

overly nit: "this use" -> "this uses"?

[Ryan Hamilton, 2015/11/04 04:10:11]

Done.

+  QuicWallTime WallNow() const override;
+
  protected:
   EpollServer* epoll_server_;