Make existing unit tests only run on GL contexts

tests/GpuDrawPathTest.cpp

Index: tests/GpuDrawPathTest.cpp
diff --git a/tests/GpuDrawPathTest.cpp b/tests/GpuDrawPathTest.cpp
index ef3b97dc1f2cfdd64271a6e94c73d50d77c911fd..2dc7702fffa7d0fcf808cab55c2889afa52885b3 100644
--- a/tests/GpuDrawPathTest.cpp
+++ b/tests/GpuDrawPathTest.cpp
@@ -76,7 +76,7 @@ static void test_drawSameRectOvals(skiatest::Reporter*, SkCanvas* canvas) {
     fill_and_stroke(canvas, oval1, oval2, SkDashPathEffect::Make(intervals, 2, 0));
 }
 
-DEF_GPUTEST_FOR_ALL_CONTEXTS(GpuDrawPath, reporter, ctxInfo) {
+DEF_GPUTEST_FOR_ALL_GL_CONTEXTS(GpuDrawPath, reporter, ctxInfo) {
     for (auto& test_func : { &test_drawPathEmpty, &test_drawSameRectOvals }) {
         for (auto& sampleCount : {0, 4, 16}) {
             SkImageInfo info = SkImageInfo::MakeN32Premul(255, 255);