WebGL 2: Add back a failing Win/Intel UBO test.

content/test/gpu/gpu_tests/webgl2_conformance_expectations.py

Index: content/test/gpu/gpu_tests/webgl2_conformance_expectations.py
diff --git a/content/test/gpu/gpu_tests/webgl2_conformance_expectations.py b/content/test/gpu/gpu_tests/webgl2_conformance_expectations.py
index 746f0aae124baf01637c4dc65fd87b1abacc9889..76eeb132ade4766d3e0c111cc6b3bf36a7e6b11f 100644
--- a/content/test/gpu/gpu_tests/webgl2_conformance_expectations.py
+++ b/content/test/gpu/gpu_tests/webgl2_conformance_expectations.py
@@ -205,6 +205,8 @@ class WebGL2ConformanceExpectations(WebGLConformanceExpectations):
         ['win', 'intel'], bug=483282)
     self.Fail('deqp/functional/gles3/textureshadow/2d_array_*.html',
         ['win', 'intel'], bug=483282)
+    self.Fail('conformance2/rendering/uniform-block-buffer-size.html',
+        ['win', 'intel'], bug=628863)
 
     # It's unfortunate that these suppressions need to be so broad, but it
     # looks like the D3D11 device can be lost spontaneously on this