fix the bugs of getSyncParameter in gl-object-get-calls.html

gpu/blink/webgraphicscontext3d_impl.cc

Index: gpu/blink/webgraphicscontext3d_impl.cc
diff --git a/gpu/blink/webgraphicscontext3d_impl.cc b/gpu/blink/webgraphicscontext3d_impl.cc
index 040d7e1c068f51443d86d0a5fc79f86589a935ab..f7675a25fd808ad5c585c82ddb066d3543fd452a 100644
--- a/gpu/blink/webgraphicscontext3d_impl.cc
+++ b/gpu/blink/webgraphicscontext3d_impl.cc
@@ -574,6 +574,15 @@ blink::WebString WebGraphicsContext3DImpl::getString(
       reinterpret_cast<const char*>(gl_->GetString(name)));
 }
 
+void WebGraphicsContext3DImpl::getSynciv(blink::WGC3Dsync sync,
+                                         blink::WGC3Denum pname,
+                                         blink::WGC3Dsizei bufSize,
+                                         blink::WGC3Dsizei *length,
+                                         blink::WGC3Dint *params) {
+  return gl_->GetSynciv(
+      reinterpret_cast<GLsync>(sync), pname, bufSize, length, params);
+}
+
 DELEGATE_TO_GL_3(getTexParameterfv, GetTexParameterfv,
                  WGC3Denum, WGC3Denum, WGC3Dfloat*)