Add gfx::SurfaceFactoryWebview

ui/gl/android/surface_factory_webview.cc

+// Copyright (c) 2013 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/android/surface_factory_webview.h"
+
+namespace gfx {
+
+namespace {
+SurfaceFactoryWebView* g_factory_instance;
+}  // namespace
+
+SurfaceFactoryWebView::~SurfaceFactoryWebView() {}
+
+// static
+SurfaceFactoryWebView* SurfaceFactoryWebView::GetInstance() {
+  return g_factory_instance;
+}
+
+// static
+void SurfaceFactoryWebView::SetInstance(
+    SurfaceFactoryWebView* instance) {
+  g_factory_instance = instance;
+}
+
+}  // namespace gfx