Add forgotten layout tests

client/tests/client/dom/WebGL1Test.dart

Index: client/tests/client/dom/WebGL1Test.dart
diff --git a/client/tests/client/dom/WebGL1Test.dart b/client/tests/client/dom/WebGL1Test.dart
new file mode 100644
index 0000000000000000000000000000000000000000..8042a018c91f401b7db88f4f014e21449f17051a
--- /dev/null
+++ b/client/tests/client/dom/WebGL1Test.dart
@@ -0,0 +1,20 @@
+#library('WebGL1Test');
+#import('../../../testing/unittest/unittest.dart');
+#import('dart:dom');
+
+// Test that WebGL is present in dart:dom API
+
+main() {
+  forLayoutTests();
+
+  test('simple', () {
+      var canvas = document.createElement("canvas");
+      var gl = canvas.getContext("experimental-webgl");
+      var shader = gl.createShader(WebGLRenderingContext.VERTEX_SHADER);
+      gl.shaderSource(shader, "void main() { }");
+      gl.compileShader(shader);
+      var success =
+          gl.getShaderParameter(shader, WebGLRenderingContext.COMPILE_STATUS);
+      Expect.isTrue(success);
+  });
+}