Add ScopedSurfaceRequestManager

gpu/ipc/common/android/scoped_surface_request_manager.cc

+// Copyright 2016 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 "gpu/ipc/common/android/scoped_surface_request_manager.h"
+
+#include "base/logging.h"
+
+namespace gpu {
+namespace {
+
+ScopedSurfaceRequestManager* g_instance = nullptr;
+
+}  // namespace
+
+// static
+ScopedSurfaceRequestManager* ScopedSurfaceRequestManager::GetInstance() {
+  DCHECK(g_instance);
+  return g_instance;
+}
+
+// static
+void ScopedSurfaceRequestManager::SetInstance(
+    ScopedSurfaceRequestManager* instance) {
+  DCHECK(!g_instance || !instance);
+  g_instance = instance;
+}
+
+}  // namespace gpu