Allow both Context3D and Graphics3D with the video decoder

ppapi/shared_impl/video_decoder_impl.cc

Index: ppapi/shared_impl/video_decoder_impl.cc
diff --git a/ppapi/shared_impl/video_decoder_impl.cc b/ppapi/shared_impl/video_decoder_impl.cc
index ecdde86040c762f193ced857dc9c8bbcfbafdb58..37bc5e17670c4bdf036808a73d0fe7b60cbde654 100644
--- a/ppapi/shared_impl/video_decoder_impl.cc
+++ b/ppapi/shared_impl/video_decoder_impl.cc
@@ -26,17 +26,14 @@ VideoDecoderImpl::VideoDecoderImpl()
 VideoDecoderImpl::~VideoDecoderImpl() {
 }
 
-bool VideoDecoderImpl::Init(PP_Resource context3d_id,
-                            PPB_Context3D_API* context3d,
-                            const PP_VideoConfigElement* decoder_config) {
-  if (!context3d || !decoder_config || !context3d_id)
-    return false;
-
+void VideoDecoderImpl::InitCommon(
+    PP_Resource context3d_id,
+    gpu::gles2::GLES2Implementation* gles2_impl) {
+  DCHECK(context3d_id);
   DCHECK(!gles2_impl_ && !context3d_id_);
-  gles2_impl_ = context3d->GetGLES2Impl();
+  gles2_impl_ = gles2_impl;
   TrackerBase::Get()->GetResourceTracker()->AddRefResource(context3d_id);
   context3d_id_ = context3d_id;
-  return true;
 }
 
 void VideoDecoderImpl::Destroy() {