Revert of Removed unused cricket::VideoCapturer methods

webrtc/api/test/fakeperiodicvideocapturer.h

Index: webrtc/api/test/fakeperiodicvideocapturer.h
diff --git a/webrtc/api/test/fakeperiodicvideocapturer.h b/webrtc/api/test/fakeperiodicvideocapturer.h
index 65f83ed8a6145d526bf609b2d211bf850214b4b2..256361800c2eb4e3fd1edda071f4fcf258e9a673 100644
--- a/webrtc/api/test/fakeperiodicvideocapturer.h
+++ b/webrtc/api/test/fakeperiodicvideocapturer.h
@@ -19,8 +19,7 @@
 
 namespace webrtc {
 
-class FakePeriodicVideoCapturer : public cricket::FakeVideoCapturer,
-                                  public rtc::MessageHandler {
+class FakePeriodicVideoCapturer : public cricket::FakeVideoCapturer {
  public:
   FakePeriodicVideoCapturer() {
     std::vector<cricket::VideoFormat> formats;
@@ -56,6 +55,8 @@
             GetCaptureFormat()->interval / rtc::kNumNanosecsPerMillisec),
             this, MSG_CREATEFRAME);
         }
+    } else {
+      FakeVideoCapturer::OnMessage(msg);
     }
   }