Inject TickTimeInterface into VCM and tests

The purpose of this change is to introduce dependency injection
of the timer into the video coding module.

Review URL: http://webrtc-codereview.appspot.com/332003

git-svn-id: http://webrtc.googlecode.com/svn/trunk@1220 4adac7df-926f-26a2-2b94-8c16560cd09d

src/modules/video_coding/main/source/jitter_buffer.h

@@ -33,6 +33,7 @@ enum VCMNackMode
 };
 
 // forward declarations
+class TickTimeInterface;
 class VCMFrameBuffer;
 class VCMPacket;
 class VCMEncodedFrame;
@@ -49,7 +50,8 @@ public:
 class VCMJitterBuffer
 {
 public:
-    VCMJitterBuffer(WebRtc_Word32 vcmId = -1,
+    VCMJitterBuffer(TickTimeInterface* clock,
+                    WebRtc_Word32 vcmId = -1,
                     WebRtc_Word32 receiverId = -1,
                     bool master = true);
     virtual ~VCMJitterBuffer();
@@ -191,6 +193,7 @@ private:
 
     WebRtc_Word32                 _vcmId;
     WebRtc_Word32                 _receiverId;
+    TickTimeInterface*              _clock;
     // If we are running (have started) or not
     bool                          _running;
     CriticalSectionWrapper*       _critSect;