Check for the extension before creating compressed textures in SwizzleTest.

Change-Id: Ia561fc7bb0262ab6974517d9796e4828db5b511c
Reviewed-on: https://chromium-review.googlesource.com/263251
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Tested-by: Geoff Lang <geofflang@chromium.org>
diff --git a/src/tests/end2end_tests/SwizzleTest.cpp b/src/tests/end2end_tests/SwizzleTest.cpp
index 4fe23a2..0b2af05 100644
--- a/src/tests/end2end_tests/SwizzleTest.cpp
+++ b/src/tests/end2end_tests/SwizzleTest.cpp
@@ -265,6 +265,11 @@
 
 TYPED_TEST(SwizzleTest, CompressedDXT_2D)
 {
+    if (!extensionEnabled("GL_EXT_texture_compression_dxt1"))
+    {
+        return;
+    }
+
     init2DCompressedTexture(GL_COMPRESSED_RGBA_S3TC_DXT1_EXT, pixel_0_width, pixel_0_height, pixel_0_size, pixel_0_data);
     runTest2D();
 }