Add SocketWatcherFactory as a helper class to NQE

net/base/socket_performance_watcher_factory.h

Index: net/base/socket_performance_watcher_factory.h
diff --git a/net/base/socket_performance_watcher_factory.h b/net/base/socket_performance_watcher_factory.h
index cbd607ab3366cbba1e24dea1a6dcaab205dd8320..df54e597efe45967ded2fce7416c0df5464a1e82 100644
--- a/net/base/socket_performance_watcher_factory.h
+++ b/net/base/socket_performance_watcher_factory.h
@@ -9,10 +9,6 @@
 #include "base/memory/scoped_ptr.h"
 #include "net/base/net_export.h"
 
-namespace base {
-class TimeDelta;
-}  // namespace base
-
 namespace net {
 
 class SocketPerformanceWatcher;
@@ -34,14 +30,6 @@ class NET_EXPORT_PRIVATE SocketPerformanceWatcherFactory {
   virtual scoped_ptr<SocketPerformanceWatcher> CreateSocketPerformanceWatcher(
       const Protocol protocol) = 0;
 
-  // Called when updated transport layer RTT information is available from one
-  // of the watchers created by |this|. |protocol| is the protocol that was used
-  // by the watcher. |rtt| must be the transport layer RTT from this device to
-  // the remote transport layer endpoint. These methods are called immediately
-  // after the observation is made, hence no timestamp.
-  virtual void OnUpdatedRTTAvailable(const Protocol protocol,
-                                     const base::TimeDelta& rtt) = 0;
-
  protected:
   SocketPerformanceWatcherFactory() {}