视频播放列表更新，增加分享海报生成

gcanvas/context-webgl/ActiveInfo.js

@@ -0,0 +1,11 @@
+export default class WebGLActiveInfo {
+    className = 'WebGLActiveInfo';
+
+    constructor({
+        type, name, size
+    }) {
+        this.type = type;
+        this.name = name;
+        this.size = size;
+    }
+}