#30a adding graphDiv to Scene2d similarly to Scene / thanks @etpinard

Author: monfera

src/plots/gl2d/index.js

@@ -50,8 +50,9 @@ exports.plot = function plotGl2d(gd) {
         // If Scene is not instantiated, create one!
         if(scene === undefined) {
             scene = new Scene2D({
-                container: gd.querySelector('.gl-container'),
                 id: subplotId,
+                graphDiv: gd,
+                container: gd.querySelector('.gl-container'),
                 staticPlot: gd._context.staticPlot,
                 plotGlPixelRatio: gd._context.plotGlPixelRatio
             },

src/plots/gl2d/scene2d.js

@@ -27,6 +27,7 @@ var STATIC_CANVAS, STATIC_CONTEXT;
 
 function Scene2D(options, fullLayout) {
     this.container = options.container;
+    this.graphDiv = options.graphDiv;
     this.pixelRatio = options.plotGlPixelRatio || window.devicePixelRatio;
     this.id = options.id;
     this.staticPlot = !!options.staticPlot;
@@ -275,7 +276,7 @@ var relayoutCallback = function(scene) {
         xrange: scene.xaxis.range.slice(0),
         yrange: scene.yaxis.range.slice(0)
     };
-    scene.container.parentElement.parentElement.parentElement.emit('plotly_relayout', update);
+    scene.graphDiv.emit('plotly_relayout', update);
 };
 
 proto.cameraChanged = function() {