Remove an unnecessary webrtc:: namespace prefix.

R=stefan@webrtc.org, niklas.enbom@webrtc.org
BUG=none
TEST=none

Review URL: https://webrtc-codereview.appspot.com/50129004

Cr-Commit-Position: refs/heads/master@{#9319}

webrtc/modules/video_coding/main/source/packet.h

@@ -41,7 +41,7 @@ public:
     bool                    markerBit;
 
     FrameType               frameType;
-    webrtc::VideoCodecType  codec;
+    VideoCodecType          codec;
 
     bool isFirstPacket;                 // Is this first packet in a frame.
     VCMNaluCompleteness completeNALU;   // Default is kNaluIncomplete.