rename sk_gpu_test::GLContext to sk_gpu_test::GLTestContext

rename subclasses

Fix up the EGL native GLTestContext
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1849463002

TBR=jvanverth@google.com

Committed: https://skia.googlesource.com/skia/+/4c7f0a16312c374eba4e8d5d46435ce9eb0b9971

Review URL: https://codereview.chromium.org/1849463002
diff --git a/bench/nanobench.cpp b/bench/nanobench.cpp
index 235de02..521824e 100644
--- a/bench/nanobench.cpp
+++ b/bench/nanobench.cpp
@@ -58,7 +58,7 @@
     #include "GrContextFactory.h"
     #include "gl/GrGLUtil.h"
     using sk_gpu_test::GrContextFactory;
-    using sk_gpu_test::GLContext;
+    using sk_gpu_test::GLTestContext;
     SkAutoTDelete<GrContextFactory> gGrFactory;
 #endif
 
@@ -158,7 +158,7 @@
 #if SK_SUPPORT_GPU
 struct GPUTarget : public Target {
     explicit GPUTarget(const Config& c) : Target(c), gl(nullptr) { }
-    GLContext* gl;
+    GLTestContext* gl;
 
     void setup() override {
         this->gl->makeCurrent();