Use IpcVideoFrameCapturer on network thread instead of capturer thread.

remoting/host/ipc_desktop_environment_unittest.cc

 // Copyright (c) 2013 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 <stdint.h>
 
 #include <utility>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
@@ skipping 276 matching lines @@
       .Times(AnyNumber())
       .WillRepeatedly(InvokeWithoutArgs(
           this, &IpcDesktopEnvironmentTest::DeleteDesktopEnvironment));
   EXPECT_CALL(client_session_control_, OnLocalMouseMoved(_))
       .Times(0);
   EXPECT_CALL(client_session_control_, SetDisableInputs(_))
       .Times(0);
 
   // Create a desktop environment instance.
   desktop_environment_factory_.reset(new IpcDesktopEnvironmentFactory(
-      task_runner_,
-      task_runner_,
-      task_runner_,
-      io_task_runner_,
-      &daemon_channel_));
+      task_runner_, task_runner_, io_task_runner_, &daemon_channel_));
   desktop_environment_ = desktop_environment_factory_->Create(
       client_session_control_factory_.GetWeakPtr());
 
   screen_controls_ = desktop_environment_->CreateScreenControls();
 
   // Create the input injector.
   input_injector_ = desktop_environment_->CreateInputInjector();
 
   // Create the screen capturer.
   video_capturer_ =
@@ skipping 430 matching lines @@
       .WillOnce(InvokeWithoutArgs(
           this, &IpcDesktopEnvironmentTest::DeleteDesktopEnvironment));
 
   // Change the desktop resolution.
   screen_controls_->SetScreenResolution(ScreenResolution(
       webrtc::DesktopSize(100, 100),
       webrtc::DesktopVector(96, 96)));
 }
 
 }  // namespace remoting