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/tools/skiaserve/Request.cpp b/tools/skiaserve/Request.cpp
index 225ca39..7534b1d 100644
--- a/tools/skiaserve/Request.cpp
+++ b/tools/skiaserve/Request.cpp
@@ -65,8 +65,8 @@
 SkCanvas* Request::getCanvas() {
 #if SK_SUPPORT_GPU
     GrContextFactory* factory = fContextFactory;
-    GLTestContext* gl = factory->getContextInfo(GrContextFactory::kNative_GLContextType,
-                                            GrContextFactory::kNone_GLContextOptions).fGLContext;
+    GLTestContext* gl = factory->getContextInfo(GrContextFactory::kNativeGL_ContextType,
+                                            GrContextFactory::kNone_ContextOptions).fGLContext;
     gl->makeCurrent();
 #endif
     SkASSERT(fDebugCanvas);
@@ -109,8 +109,8 @@
 
 GrContext* Request::getContext() {
 #if SK_SUPPORT_GPU
-  return fContextFactory->get(GrContextFactory::kNative_GLContextType,
-                              GrContextFactory::kNone_GLContextOptions);
+  return fContextFactory->get(GrContextFactory::kNativeGL_ContextType,
+                              GrContextFactory::kNone_ContextOptions);
 #else
   return nullptr;
 #endif