Rename enums in GrContextFactory to remove "GL"

Also, remove kNative as a separate context type and instead make it an alias for kGL or kGLES based on OS.

GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1845923004

Committed: https://skia.googlesource.com/skia/+/2d9c6f81353597aebf5934547e5cba7a872196fb

Review URL: https://codereview.chromium.org/1845923004
diff --git a/tests/GrContextAbandonTest.cpp b/tests/GrContextAbandonTest.cpp
index c62973f..e1ad8f7 100644
--- a/tests/GrContextAbandonTest.cpp
+++ b/tests/GrContextAbandonTest.cpp
@@ -16,10 +16,10 @@
 
 DEF_GPUTEST(GrContext_abandonContext, reporter, /*factory*/) {
     for (int testType = 0; testType < 6; ++testType) {
-    for (int i = 0; i < GrContextFactory::kGLContextTypeCnt; ++i) {
-        GrContextFactory testFactory;
-        GrContextFactory::GLContextType ctxType = (GrContextFactory::GLContextType) i;
-        GrContextFactory::ContextInfo info = testFactory.getContextInfo(ctxType);
+        for (int i = 0; i < GrContextFactory::kContextTypeCnt; ++i) {
+            GrContextFactory testFactory;
+            GrContextFactory::ContextType ctxType = (GrContextFactory::ContextType) i;
+            GrContextFactory::ContextInfo info = testFactory.getContextInfo(ctxType);
             if (GrContext* context = info.fGrContext) {
                 switch (testType) {
                     case 0: