[PPAPI] Moving pp::VarResource_Dev API into pp::Var (now stable).

ppapi/examples/media_stream_video/media_stream_video.cc

Index: ppapi/examples/media_stream_video/media_stream_video.cc
diff --git a/ppapi/examples/media_stream_video/media_stream_video.cc b/ppapi/examples/media_stream_video/media_stream_video.cc
index b23f3eddbe8e91e11a66360904ee0d8012917d73..732688baae3f02c6cff5f2fc17fd2e4c408c4d45 100644
--- a/ppapi/examples/media_stream_video/media_stream_video.cc
+++ b/ppapi/examples/media_stream_video/media_stream_video.cc
@@ -5,7 +5,6 @@
 #include "ppapi/c/pp_errors.h"
 #include "ppapi/c/ppb_opengles2.h"
 #include "ppapi/cpp/completion_callback.h"
-#include "ppapi/cpp/dev/var_resource_dev.h"
 #include "ppapi/cpp/graphics_3d.h"
 #include "ppapi/cpp/graphics_3d_client.h"
 #include "ppapi/cpp/instance.h"
@@ -132,7 +131,7 @@ void MediaStreamVideoDemoInstance::HandleMessage(const pp::Var& var_message) {
   if (!var_track.is_resource())
     return;
 
-  pp::Resource resource_track = pp::VarResource_Dev(var_track).AsResource();
+  pp::Resource resource_track = var_track.AsResource();
 
   video_track_ = pp::MediaStreamVideoTrack(resource_track);