Simplify BitrateAllocator::AddBitrateObserver.

webrtc/video_engine/encoder_state_feedback_unittest.cc

Index: webrtc/video_engine/encoder_state_feedback_unittest.cc
diff --git a/webrtc/video_engine/encoder_state_feedback_unittest.cc b/webrtc/video_engine/encoder_state_feedback_unittest.cc
index 9dc6c2ff9a8a011599d59c2a8ca5549d2d2c557b..dc93266589a32e587e8628122f9ee55bc654abd7 100644
--- a/webrtc/video_engine/encoder_state_feedback_unittest.cc
+++ b/webrtc/video_engine/encoder_state_feedback_unittest.cc
@@ -17,6 +17,7 @@
 
 #include "webrtc/base/scoped_ptr.h"
 #include "webrtc/common.h"
+#include "webrtc/modules/bitrate_controller/include/bitrate_controller.h"
 #include "webrtc/modules/pacing/include/paced_sender.h"
 #include "webrtc/modules/pacing/include/packet_router.h"
 #include "webrtc/modules/rtp_rtcp/interface/rtp_rtcp_defines.h"
@@ -31,7 +32,7 @@ namespace webrtc {
 class MockVieEncoder : public ViEEncoder {
  public:
   explicit MockVieEncoder(ProcessThread* process_thread, PacedSender* pacer)
-      : ViEEncoder(1, 1, *process_thread, pacer, NULL, NULL) {}
+      : ViEEncoder(1, 1, *process_thread, pacer, NULL) {}
   ~MockVieEncoder() {}
 
   MOCK_METHOD1(OnReceivedIntraFrameRequest,