Fix BlendMinMaxTest.RGBA16F on D3D11 Feature Level 9_3

This test checks for OES_texture_half_float, but it's trying to use a
16F texture as a color buffer so it should be checking for
EXT_color_buffer_half_float.

Since EXT_color_buffer_half_float requires more format support (e.g.
R16F, RG16F, RGB16F) than OES_texture_half_float, it's possible for an
implementation to support one extension and not the other. D3D11 Feature
Level 9_3 does this.

Change-Id: I40fb38aa3f419be2606464bd0476cd064afe90fa
Reviewed-on: https://chromium-review.googlesource.com/319642
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Tested-by: Austin Kinross <aukinros@microsoft.com>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
diff --git a/src/tests/gl_tests/BlendMinMaxTest.cpp b/src/tests/gl_tests/BlendMinMaxTest.cpp
index 0b8bc81..2de2ab1 100644
--- a/src/tests/gl_tests/BlendMinMaxTest.cpp
+++ b/src/tests/gl_tests/BlendMinMaxTest.cpp
@@ -184,9 +184,10 @@
 
 TEST_P(BlendMinMaxTest, RGBA16F)
 {
-    if (getClientVersion() < 3 && !extensionEnabled("GL_OES_texture_half_float"))
+    if (getClientVersion() < 3 && !extensionEnabled("GL_EXT_color_buffer_half_float"))
     {
-        std::cout << "Test skipped because ES3 or GL_OES_texture_half_float is not available." << std::endl;
+        std::cout << "Test skipped because ES3 or GL_EXT_color_buffer_half_float is not available."
+                  << std::endl;
         return;
     }
 
@@ -201,4 +202,4 @@
 }
 
 // Use this to select which configurations (e.g. which renderer, which GLES major version) these tests should be run against.
-ANGLE_INSTANTIATE_TEST(BlendMinMaxTest, ES2_D3D9(), ES2_D3D11(), ES2_OPENGL());
+ANGLE_INSTANTIATE_TEST(BlendMinMaxTest, ES2_D3D9(), ES2_D3D11(), ES2_D3D11_FL9_3(), ES2_OPENGL());