Use IpcVideoFrameCapturer on network thread instead of capturer thread.

remoting/host/client_session_unittest.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 "remoting/host/client_session.h"
 
 #include <stdint.h>
 
 #include <algorithm>
 #include <string>
@@ skipping 170 matching lines @@
   // Mock protocol::ConnectionToClient APIs called directly by ClientSession.
   // HostStub is not touched by ClientSession, so we can safely pass nullptr.
   scoped_ptr<protocol::FakeConnectionToClient> connection(
       new protocol::FakeConnectionToClient(std::move(session)));
   connection->set_client_stub(&client_stub_);
   connection_ = connection.get();
 
   client_session_.reset(new ClientSession(
       &session_event_handler_,
       task_runner_,  // Audio thread.
-      task_runner_,  // Input thread.
-      task_runner_,  // Capture thread.
-      task_runner_,  // Encode thread.
-      task_runner_,  // Network thread.
-      task_runner_,  // UI thread.
       std::move(connection), desktop_environment_factory_.get(),
       base::TimeDelta(), nullptr, extensions_));
 }
 
 void ClientSessionTest::ConnectClientSession() {
   EXPECT_CALL(session_event_handler_, OnSessionAuthenticated(_));
   EXPECT_CALL(session_event_handler_, OnSessionChannelsConnected(_));
 
   // Stubs should be set only after connection is authenticated.
   EXPECT_FALSE(connection_->clipboard_stub());
@@ skipping 311 matching lines @@
 
   client_session_->DisconnectSession(protocol::OK);
   client_session_.reset();
 
   // ext1 was instantiated and wrapped the video capturer.
   EXPECT_TRUE(extension.was_instantiated());
   EXPECT_TRUE(extension.has_wrapped_video_capturer());
 }
 
 }  // namespace remoting