Use correct thread for audio capturing and encoding.

remoting/host/chromoting_host_unittest.cc

Index: remoting/host/chromoting_host_unittest.cc
diff --git a/remoting/host/chromoting_host_unittest.cc b/remoting/host/chromoting_host_unittest.cc
index 361649132059e6342e6445104c4c43a95fdc8349..2ca3749c59601736fc2f211468d96c50d2af9f22 100644
--- a/remoting/host/chromoting_host_unittest.cc
+++ b/remoting/host/chromoting_host_unittest.cc
@@ -7,7 +7,6 @@
 #include "base/message_loop_proxy.h"
 #include "remoting/base/auto_thread_task_runner.h"
 #include "remoting/jingle_glue/mock_objects.h"
-#include "remoting/host/audio_capturer.h"
 #include "remoting/host/chromoting_host_context.h"
 #include "remoting/host/chromoting_host.h"
 #include "remoting/host/desktop_environment.h"
@@ -145,6 +144,7 @@ class ChromotingHostTest : public testing::Test {
         &signal_strategy_,
         desktop_environment_factory_.get(),
         scoped_ptr<protocol::SessionManager>(session_manager_),
+        context_.audio_task_runner(),
         context_.capture_task_runner(),
         context_.encode_task_runner(),
         context_.network_task_runner());
@@ -251,6 +251,7 @@ class ChromotingHostTest : public testing::Test {
     protocol::ConnectionToClient* connection_ptr = connection.get();
     scoped_refptr<ClientSession> client = new ClientSession(
         host_.get(),
+        context_.audio_task_runner(),
         context_.capture_task_runner(),
         context_.encode_task_runner(),
         context_.network_task_runner(),
@@ -299,8 +300,7 @@ class ChromotingHostTest : public testing::Test {
   DesktopEnvironment* CreateDesktopEnvironment(ClientSession* client) {
     scoped_ptr<EventExecutor> event_executor(new EventExecutorFake());
     scoped_ptr<VideoFrameCapturer> video_capturer(new VideoFrameCapturerFake());
-    return new DesktopEnvironment(scoped_ptr<AudioCapturer>(NULL),
-                                  event_executor.Pass(),
+    return new DesktopEnvironment(event_executor.Pass(),
                                   video_capturer.Pass());
   }