Revert of Move SkGLContext and some GrGLInterface implementations to skgputest module

src/gpu/gl/nacl/SkCreatePlatformGLContext_nacl.cpp

Index: src/gpu/gl/nacl/SkCreatePlatformGLContext_nacl.cpp
diff --git a/src/gpu/gl/nacl/SkCreatePlatformGLContext_nacl.cpp b/src/gpu/gl/nacl/SkCreatePlatformGLContext_nacl.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..855f0dc1245ad7406f6862d1ca9dbe77461a907c
--- /dev/null
+++ b/src/gpu/gl/nacl/SkCreatePlatformGLContext_nacl.cpp
@@ -0,0 +1,12 @@
+/*
+ * Copyright 2012 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+#include "gl/SkGLContext.h"
+
+SkGLContext* SkCreatePlatformGLContext(GrGLStandard forcedGpuAPI, SkGLContext* shareContext) {
+    SkASSERT(!shareContext);
+    return nullptr;
+}