Revert of Mac Overlays: Add GPU back-pressure

ui/gl/scoped_api.cc

Index: ui/gl/scoped_api.cc
diff --git a/ui/gl/scoped_api.cc b/ui/gl/scoped_api.cc
deleted file mode 100644
index f43f692ac0f7a084f37ff4751a29b999552e8f75..0000000000000000000000000000000000000000
--- a/ui/gl/scoped_api.cc
+++ /dev/null
@@ -1,20 +0,0 @@
-// Copyright 2015 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "ui/gl/scoped_api.h"
-
-#include "ui/gl/gl_gl_api_implementation.h"
-
-namespace gfx {
-
-ScopedSetGLToRealGLApi::ScopedSetGLToRealGLApi()
-    : old_gl_api_(GetCurrentGLApi()) {
-  SetGLToRealGLApi();
-}
-
-ScopedSetGLToRealGLApi::~ScopedSetGLToRealGLApi() {
-  SetGLApi(old_gl_api_);
-}
-
-}  // namespace gfx