Revert of rename sk_gpu_test::GLContext to sk_gpu_test::GLTestContext (patchset #5 id:80001 of https://codereview.chromium.org/1849463002/ )

Reason for revert:
breaking bots

Original issue's description:
> 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

TBR=jvanverth@google.com
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Review URL: https://codereview.chromium.org/1850543003
diff --git a/tools/VisualBench/VisualStreamTimingModule.cpp b/tools/VisualBench/VisualStreamTimingModule.cpp
index b572621..0ac698e 100644
--- a/tools/VisualBench/VisualStreamTimingModule.cpp
+++ b/tools/VisualBench/VisualStreamTimingModule.cpp
@@ -23,7 +23,7 @@
             fBenchmarkStream->current()->delayedSetup();
             // fallthrough
         case kReset_InitState:
-            // This will flicker unfortunately, but as we are reseting the GLTestContext each bench,
+            // This will flicker unfortunately, but as we are reseting the GLContext each bench,
             // we unfortunately don't have a choice
             fOwner->clear(canvas, SK_ColorWHITE, 3);
             fBenchmarkStream->current()->preTimingHooks(canvas);