Allow both Context3D and Graphics3D with the video decoder

ppapi/cpp/dev/video_decoder_dev.cc

Index: ppapi/cpp/dev/video_decoder_dev.cc
diff --git a/ppapi/cpp/dev/video_decoder_dev.cc b/ppapi/cpp/dev/video_decoder_dev.cc
index baf180dff02cb7e95019a4d5ca58e04d758e967c..cde75f6025f8e34cf2029c9a2924d9e05932d9bb 100644
--- a/ppapi/cpp/dev/video_decoder_dev.cc
+++ b/ppapi/cpp/dev/video_decoder_dev.cc
@@ -8,6 +8,7 @@
 #include "ppapi/c/dev/ppp_video_decoder_dev.h"
 #include "ppapi/c/pp_errors.h"
 #include "ppapi/cpp/dev/context_3d_dev.h"
+#include "ppapi/cpp/dev/graphics_3d_dev.h"
 #include "ppapi/cpp/instance.h"
 #include "ppapi/cpp/module.h"
 #include "ppapi/cpp/module_impl.h"
@@ -31,6 +32,15 @@ VideoDecoder_Dev::VideoDecoder_Dev(const Instance& instance,
       instance.pp_instance(), context.pp_resource(), config));
 }
 
+VideoDecoder_Dev::VideoDecoder_Dev(const Instance& instance,
+                                   const Graphics3D_Dev& context,
+                                   const PP_VideoConfigElement* config) {
+  if (!has_interface<PPB_VideoDecoder_Dev>())
+    return;
+  PassRefFromConstructor(get_interface<PPB_VideoDecoder_Dev>()->Create(
+      instance.pp_instance(), context.pp_resource(), config));
+}
+
 VideoDecoder_Dev::VideoDecoder_Dev(PP_Resource resource) : Resource(resource) {
 }