Remove WebCallbackTask

components/test_runner/mock_webrtc_dtmf_sender_handler.cc

Index: components/test_runner/mock_webrtc_dtmf_sender_handler.cc
diff --git a/components/test_runner/mock_webrtc_dtmf_sender_handler.cc b/components/test_runner/mock_webrtc_dtmf_sender_handler.cc
index 363b6da984baf7985d89d44c5f46ca00fe863447..7f7a30f0ffd1dc2aa8d03c40df884199c9cda012 100644
--- a/components/test_runner/mock_webrtc_dtmf_sender_handler.cc
+++ b/components/test_runner/mock_webrtc_dtmf_sender_handler.cc
@@ -7,7 +7,6 @@
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/logging.h"
-#include "components/test_runner/web_task.h"
 #include "components/test_runner/web_test_delegate.h"
 #include "third_party/WebKit/public/platform/WebMediaStreamSource.h"
 #include "third_party/WebKit/public/platform/WebRTCDTMFSenderHandlerClient.h"
@@ -50,8 +49,8 @@ bool MockWebRTCDTMFSenderHandler::insertDTMF(const WebString& tones,
   tone_buffer_ = tones;
   base::Closure closure = base::Bind(&MockWebRTCDTMFSenderHandler::PlayTone,
                                      weak_factory_.GetWeakPtr());
-  delegate_->PostTask(new WebCallbackTask(closure));
-  delegate_->PostTask(new WebCallbackTask(closure));
+  delegate_->PostTask(closure);
+  delegate_->PostTask(closure);
   return true;
 }