Roll webgl conformance tests to r17874: part 2, adding r17874

third_party/webgl/sdk/tests/conformance/resources/ogles-tests.css

+canvas {
+  background-color: white;
+  background-size: 8px 8px;
+}
+
+.shader-source {
+  border: 1px dashed black;
+  padding: 1em;
+}
+
+.shader-source li:nth-child(odd) { background: #f8f8f8; }
+.shader-source li:nth-child(even) { background: #f0f0f0; }
+
+.testimages {
+}
+
+.testimages br {
+  clear: both;
+}
+
+.testimages > div {
+  float: left;
+  margin: 1em;
+}
+
+IMG {
+  border: 1px solid black;
+  width: 250px;
+  height: 250px;
+}