Add support for GL_OES_fbo_render_mipmap with OpenGL.

BUG=angle:905

Change-Id: Idde35172cfa495c8b74b961f4ab8c4e657653074
Reviewed-on: https://chromium-review.googlesource.com/263763
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Kenneth Russell <kbr@chromium.org>
Tested-by: Geoff Lang <geofflang@chromium.org>
diff --git a/src/tests/end2end_tests/FramebufferRenderMipmapTest.cpp b/src/tests/end2end_tests/FramebufferRenderMipmapTest.cpp
index 1944c67..a99416e 100644
--- a/src/tests/end2end_tests/FramebufferRenderMipmapTest.cpp
+++ b/src/tests/end2end_tests/FramebufferRenderMipmapTest.cpp
@@ -1,7 +1,7 @@
 #include "ANGLETest.h"
 
 // Use this to select which configurations (e.g. which renderer, which GLES major version) these tests should be run against.
-ANGLE_TYPED_TEST_CASE(FramebufferRenderMipmapTest, ES2_D3D9, ES2_D3D11, ES3_D3D11);
+ANGLE_TYPED_TEST_CASE(FramebufferRenderMipmapTest, ES2_D3D9, ES2_D3D11, ES3_D3D11, ES2_OPENGL, ES3_OPENGL);
 
 template<typename T>
 class FramebufferRenderMipmapTest : public ANGLETest