Change ProcessThread's task type to be the one from TaskQueue.

webrtc/modules/video_coding/jitter_buffer_unittest.cc

Index: webrtc/modules/video_coding/jitter_buffer_unittest.cc
diff --git a/webrtc/modules/video_coding/jitter_buffer_unittest.cc b/webrtc/modules/video_coding/jitter_buffer_unittest.cc
index 9bdce7a0ace584a7928b4d14e7504c20d23322aa..56e41169ab110a979e243ebb6d48af8bcfc28a66 100644
--- a/webrtc/modules/video_coding/jitter_buffer_unittest.cc
+++ b/webrtc/modules/video_coding/jitter_buffer_unittest.cc
@@ -195,7 +195,7 @@ class ProcessThreadMock : public ProcessThread {
   MOCK_METHOD1(WakeUp, void(Module* module));
   MOCK_METHOD1(RegisterModule, void(Module* module));
   MOCK_METHOD1(DeRegisterModule, void(Module* module));
-  void PostTask(std::unique_ptr<ProcessTask> task) {}
+  void PostTask(std::unique_ptr<rtc::QueuedTask> task) /*override*/ {}
 };
 
 class TestBasicJitterBuffer : public ::testing::TestWithParam<std::string>,