Enable point sprites in StateManagerGL.

Fixes:
 * conformance/rendering/point-size.html
 * conformance/rendering/point-with-gl-pointcoord-in-fragment-shader.html
 * PointSpritesTest
 * particle_system sample

BUG=angleproject:883

Change-Id: Idb3352fa916cf08817496f0a8425c95ece9bfa49
Reviewed-on: https://chromium-review.googlesource.com/275860
Reviewed-by: Zhenyao Mo <zmo@chromium.org>
Tested-by: Geoff Lang <geofflang@chromium.org>
diff --git a/src/tests/gl_tests/PointSpritesTest.cpp b/src/tests/gl_tests/PointSpritesTest.cpp
index 0530251..5b8cf3b 100644
--- a/src/tests/gl_tests/PointSpritesTest.cpp
+++ b/src/tests/gl_tests/PointSpritesTest.cpp
@@ -429,4 +429,4 @@
 // We test on D3D11 9_3 because the existing D3D11 PointSprite implementation
 // uses Geometry Shaders which are not supported for 9_3.
 // D3D9 and D3D11 are also tested to ensure no regressions.
-ANGLE_INSTANTIATE_TEST(PointSpritesTest, ES2_D3D9(), ES2_D3D11(), ES2_D3D11_FL9_3());
+ANGLE_INSTANTIATE_TEST(PointSpritesTest, ES2_D3D9(), ES2_D3D11(), ES2_D3D11_FL9_3(), ES2_OPENGL(), ES3_OPENGL());