Use vcm::VideoSender in ViEEncoder.

tools/valgrind-webrtc/memcheck/suppressions.txt

Index: tools/valgrind-webrtc/memcheck/suppressions.txt
diff --git a/tools/valgrind-webrtc/memcheck/suppressions.txt b/tools/valgrind-webrtc/memcheck/suppressions.txt
index fce9259b92015e8ef27e6742f65110fc8bcb9987..4ab84b92b045481944b94df8b5b760b544dcf4c2 100644
--- a/tools/valgrind-webrtc/memcheck/suppressions.txt
+++ b/tools/valgrind-webrtc/memcheck/suppressions.txt
@@ -386,23 +386,6 @@
    ...
 }
 {
-   bug_3063
-   Memcheck:Uninitialized
-   ...
-   fun:vfprintf
-   fun:__vsnprintf_chk
-   fun:_ZN6webrtc5Trace3AddENS_10TraceLevelENS_11TraceModuleEiPKcz
-   fun:_ZNK6webrtc12ViECodecImpl21GetCodecTargetBitrateEiPj
-   fun:_ZN7cricket23WebRtcVideoMediaChannel23MaybeChangeStartBitrateEiPN6webrtc10VideoCodecE
-   fun:_ZN7cricket23WebRtcVideoMediaChannel12SetSendCodecEPNS_26WebRtcVideoChannelSendInfoERKN6webrtc10VideoCodecEiii
-   fun:_ZN7cricket23WebRtcVideoMediaChannel12SetSendCodecERKN6webrtc10VideoCodecEiii
-   fun:_ZN7cricket23WebRtcVideoMediaChannel13SetSendCodecsERKSt6vectorINS_10VideoCodecESaIS2_EE
-   fun:_ZN21VideoMediaChannelTestIN7cricket17WebRtcVideoEngineENS0_23WebRtcVideoMediaChannelEE11SetOneCodecERKNS0_10VideoCodecE
-   fun:_ZN21VideoMediaChannelTestIN7cricket17WebRtcVideoEngineENS0_23WebRtcVideoMediaChannelEE4SendERKNS0_10VideoCodecE
-   fun:_ZN21VideoMediaChannelTestIN7cricket17WebRtcVideoEngineENS0_23WebRtcVideoMediaChannelEE36TwoStreamsSendAndFailUnsignalledRecvERKNS0_10VideoCodecE
-   fun:_ZN69WebRtcVideoMediaChannelTest_TwoStreamsSendAndFailUnsignalledRecv_Test8TestBodyEv
-}
-{
    bug_3478
    Memcheck:Leak
    fun:_Znw*