Create an interface for explicit notification of Dispatcher about

net/tools/quic/quic_dispatcher.cc

Index: net/tools/quic/quic_dispatcher.cc
diff --git a/net/tools/quic/quic_dispatcher.cc b/net/tools/quic/quic_dispatcher.cc
index 802746fc038b339d47b23e254c77707a83bc5f4b..20f1157506ad0b30fb28312e7749150caa511e30 100644
--- a/net/tools/quic/quic_dispatcher.cc
+++ b/net/tools/quic/quic_dispatcher.cc
@@ -127,8 +127,6 @@ QuicDispatcher::QuicDispatcher(const QuicConfig& config,
                                EpollServer* epoll_server)
     : config_(config),
       crypto_config_(crypto_config),
-      time_wait_list_manager_(
-          new QuicTimeWaitListManager(this, epoll_server, supported_versions)),
       delete_sessions_alarm_(new DeleteSessionsAlarm(this)),
       epoll_server_(epoll_server),
       helper_(new QuicEpollConnectionHelper(epoll_server_)),
@@ -147,6 +145,9 @@ QuicDispatcher::~QuicDispatcher() {
 void QuicDispatcher::Initialize(int fd) {
   DCHECK(writer_ == NULL);
   writer_.reset(CreateWriterWrapper(CreateWriter(fd)));
+  time_wait_list_manager_.reset(
+      new QuicTimeWaitListManager(writer_.get(), this,
+                                  epoll_server(), supported_versions()));
 }
 
 // TODO(fnk): remove the Writer interface implementation in favor of
@@ -330,6 +331,11 @@ void QuicDispatcher::OnConnectionClosed(QuicGuid guid, QuicErrorCode error) {
   CleanUpSession(it);
 }
 
+void QuicDispatcher::OnWriteBlocked(QuicBlockedWriterInterface* writer) {
+  DCHECK(writer_->IsWriteBlocked());
+  write_blocked_list_.insert(make_pair(writer, true));
+}
+
 QuicSession* QuicDispatcher::CreateQuicSession(
     QuicGuid guid,
     const IPEndPoint& server_address,