Revert of rename sk_gpu_test::GLContext to sk_gpu_test::GLTestContext

tools/gpu/gl/angle/GLTestContext_angle.h

-
-/*
- * Copyright 2012 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-#ifndef GLTestContext_angle_DEFINED
-#define GLTestContext_angle_DEFINED
-
-#include "gl/GLTestContext.h"
-
-namespace sk_gpu_test {
-
-/**
- * Creates a GrGLInterface for the currently ANGLE GL context currently bound in ANGLE's EGL
- * implementation.
- */
-const GrGLInterface* CreateANGLEGLInterface();
-
-#ifdef SK_BUILD_FOR_WIN
-/** Creates a GLTestContext backed by ANGLE's Direct3D backend. */
-GLTestContext* CreateANGLEDirect3DGLTestContext();
-#endif
-
-/** Creates a GLTestContext backed by ANGLE's OpenGL backend. */
-GLTestContext* CreateANGLEOpenGLGLTestContext();
-
-}  // namespace sk_gpu_test
-#endif