Update from https://crrev.com/315085

tools/android/forwarder2/host_forwarder_main.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 <errno.h>
 #include <signal.h>
 #include <sys/types.h>
 #include <sys/wait.h>
 #include <unistd.h>
 
@@ skipping 296 matching lines @@
 class ServerDelegate : public Daemon::ServerDelegate {
  public:
   ServerDelegate(const std::string& adb_path)
       : adb_path_(adb_path), has_failed_(false) {}
 
   bool has_failed() const {
     return has_failed_ || controllers_manager_.has_failed();
   }
 
   // Daemon::ServerDelegate:
-  virtual void Init() override {
+  void Init() override {
     LOG(INFO) << "Starting host process daemon (pid=" << getpid() << ")";
     DCHECK(!g_notifier);
     g_notifier = new PipeNotifier();
     signal(SIGTERM, KillHandler);
     signal(SIGINT, KillHandler);
   }
 
-  virtual void OnClientConnected(scoped_ptr<Socket> client_socket) override {
+  void OnClientConnected(scoped_ptr<Socket> client_socket) override {
     char buf[kBufSize];
     const int bytes_read = client_socket->Read(buf, sizeof(buf));
     if (bytes_read <= 0) {
       if (client_socket->DidReceiveEvent())
         return;
       PError("Read()");
       has_failed_ = true;
       return;
     }
     const Pickle command_pickle(buf, bytes_read);
@@ skipping 23 matching lines @@
 class ClientDelegate : public Daemon::ClientDelegate {
  public:
   ClientDelegate(const Pickle& command_pickle)
       : command_pickle_(command_pickle),
         has_failed_(false) {
   }
 
   bool has_failed() const { return has_failed_; }
 
   // Daemon::ClientDelegate:
-  virtual void OnDaemonReady(Socket* daemon_socket) override {
+  void OnDaemonReady(Socket* daemon_socket) override {
     // Send the forward command to the daemon.
     CHECK_EQ(static_cast<long>(command_pickle_.size()),
              daemon_socket->WriteNumBytes(command_pickle_.data(),
                                           command_pickle_.size()));
     char buf[kBufSize];
     const int bytes_read = daemon_socket->Read(
         buf, sizeof(buf) - 1 /* leave space for null terminator */);
     CHECK_GT(bytes_read, 0);
     DCHECK(static_cast<size_t>(bytes_read) < sizeof(buf));
     buf[bytes_read] = 0;
@@ skipping 81 matching lines @@
 
   return client_delegate.has_failed() || daemon_delegate.has_failed();
 }
 
 }  // namespace
 }  // namespace forwarder2
 
 int main(int argc, char** argv) {
   return forwarder2::RunHostForwarder(argc, argv);
 }