Remove the QuicDispatcher's explicit use of EpollServer.

net/tools/quic/quic_dispatcher.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "net/tools/quic/quic_dispatcher.h"
 
 #include <errno.h>
 
 #include "base/debug/stack_trace.h"
 #include "base/logging.h"
-#include "base/stl_util.h"
 #include "net/quic/quic_blocked_writer_interface.h"
 #include "net/quic/quic_flags.h"
 #include "net/quic/quic_utils.h"
 #include "net/tools/epoll_server/epoll_server.h"
 #include "net/tools/quic/quic_default_packet_writer.h"
 #include "net/tools/quic/quic_epoll_connection_helper.h"
 #include "net/tools/quic/quic_per_connection_packet_writer.h"
 #include "net/tools/quic/quic_socket_utils.h"
 #include "net/tools/quic/quic_time_wait_list_manager.h"
 
 namespace net {
 
 namespace tools {
 
 using base::StringPiece;
 
-class DeleteSessionsAlarm : public EpollAlarm {
+namespace {
+
+// An alarm that informs the QuicDispatcher to delete old sessions.
+class DeleteSessionsAlarm : public QuicAlarm::Delegate {
  public:
   explicit DeleteSessionsAlarm(QuicDispatcher* dispatcher)
       : dispatcher_(dispatcher) {
   }
 
-  int64 OnAlarm() override {
-    EpollAlarm::OnAlarm();
+  QuicTime OnAlarm() override {
     dispatcher_->DeleteSessions();
-    return 0;
+    // Let the dispatcher register the alarm at appropriate time.
+    return QuicTime::Zero();
   }
 
  private:
+  // Not owned.
   QuicDispatcher* dispatcher_;
+
+  DISALLOW_COPY_AND_ASSIGN(DeleteSessionsAlarm);
 };
 
+}  // namespace
+
 class QuicDispatcher::QuicFramerVisitor : public QuicFramerVisitorInterface {
  public:
   explicit QuicFramerVisitor(QuicDispatcher* dispatcher)
       : dispatcher_(dispatcher),
         connection_id_(0) {}
 
   // QuicFramerVisitorInterface implementation
   void OnPacket() override {}
   bool OnUnauthenticatedPublicHeader(
       const QuicPacketPublicHeader& header) override {
@@ skipping 103 matching lines @@
     QuicConnection* connection) const {
   return dispatcher_->packet_writer_factory_->Create(
       dispatcher_->writer_.get(),
       connection);
 }
 
 QuicDispatcher::QuicDispatcher(const QuicConfig& config,
                                const QuicCryptoServerConfig& crypto_config,
                                const QuicVersionVector& supported_versions,
                                PacketWriterFactory* packet_writer_factory,
-                               EpollServer* epoll_server)
+                               QuicConnectionHelperInterface* helper)
     : config_(config),
       crypto_config_(crypto_config),
-      delete_sessions_alarm_(new DeleteSessionsAlarm(this)),
-      epoll_server_(epoll_server),
-      helper_(new QuicEpollConnectionHelper(epoll_server_)),
+      helper_(helper),
+      delete_sessions_alarm_(
+          helper_->CreateAlarm(new DeleteSessionsAlarm(this))),
       packet_writer_factory_(packet_writer_factory),
       connection_writer_factory_(this),
       supported_versions_(supported_versions),
       current_packet_(nullptr),
       framer_(supported_versions,
               /*unused*/ QuicTime::Zero(),
               Perspective::IS_SERVER),
       framer_visitor_(new QuicFramerVisitor(this)) {
   framer_.set_visitor(framer_visitor_.get());
 }
@@ skipping 175 matching lines @@
     LOG(DFATAL) << base::debug::StackTrace().ToString();
     return;
   }
 
   DLOG_IF(INFO, error != QUIC_NO_ERROR) << "Closing connection ("
                                         << connection_id
                                         << ") due to error: "
                                         << QuicUtils::ErrorToString(error);
 
   if (closed_session_list_.empty()) {
-    epoll_server_->RegisterAlarmApproximateDelta(
-        0, delete_sessions_alarm_.get());
+    delete_sessions_alarm_->Cancel();
+    delete_sessions_alarm_->Set(helper()->GetClock()->ApproximateNow());
   }
   closed_session_list_.push_back(it->second);
   CleanUpSession(it);
 }
 
 void QuicDispatcher::OnWriteBlocked(
     QuicBlockedWriterInterface* blocked_writer) {
   if (!writer_->IsWriteBlocked()) {
     LOG(DFATAL) <<
         "QuicDispatcher::OnWriteBlocked called when the writer is not blocked.";
@@ skipping 50 matching lines @@
   framer_.set_version(time_wait_list_manager_->GetQuicVersionFromConnectionId(
       header.connection_id));
 
   // Continue parsing the packet to extract the sequence number.  Then
   // send it to the time wait manager in OnUnathenticatedHeader.
   return true;
 }
 
 }  // namespace tools
 }  // namespace net