Add initial GpuMemoryBufferSurfaceTexture implementation.

content/common/android/surface_texture_lookup.cc

+// Copyright 2014 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 "content/common/android/surface_texture_lookup.h"
+
+#include "base/logging.h"
+
+namespace content {
+
+namespace {
+SurfaceTextureLookup* g_instance = NULL;
+}  // namespace
+
+// static
+SurfaceTextureLookup* SurfaceTextureLookup::GetInstance() {
+  DCHECK(g_instance);
+  return g_instance;
+}
+
+// static
+void SurfaceTextureLookup::InitInstance(SurfaceTextureLookup* instance) {
+  DCHECK(!g_instance || !instance);
+  g_instance = instance;
+}
+
+}  // namespace content