Bug 1488370 - Use target.getFront to instantiate WebGLFront; r=ochameau

Differential Revision: https://phabricator.services.mozilla.com/D7094

--HG--
extra : moz-landing-system : lando

devtools/client/shadereditor/panel.js

@@ -6,7 +6,6 @@
 "use strict";
 
 const EventEmitter = require("devtools/shared/event-emitter");
-const { WebGLFront } = require("devtools/shared/fronts/webgl");
 const { EventsHandler, ShadersListView, ShadersEditorsView, EVENTS, $, L10N } =
   require("./shadereditor");
 
@@ -34,7 +33,7 @@ ShaderEditorPanel.prototype = {
    *         A promise that is resolved when the Shader Editor completes opening.
    */
   async open() {
-    this.front = new WebGLFront(this.target.client, this.target.form);
+    this.front = this.target.getFront("webgl");
     this.shadersListView = new ShadersListView();
     this.eventsHandler = new EventsHandler();
     this.shadersEditorsView = new ShadersEditorsView();

devtools/client/shadereditor/test/head.js

@@ -13,7 +13,6 @@ Services.scriptloader.loadSubScript(
 
 var { DebuggerClient } = require("devtools/shared/client/debugger-client");
 var { DebuggerServer } = require("devtools/server/main");
-var { WebGLFront } = require("devtools/shared/fronts/webgl");
 var { Toolbox } = require("devtools/client/framework/toolbox");
 var { isWebGLSupported } = require("devtools/client/shared/webgl-utils");
 
@@ -153,7 +152,7 @@ function initBackend(aUrl) {
 
     await target.attach();
 
-    const front = new WebGLFront(target.client, target.form);
+    const front = target.getFront("webgl");
     return { target, front };
   })();
 }