Add AndroidVideoSurfaceChooser to manage overlays.

media/gpu/content_video_view_overlay_factory.cc

+// Copyright 2017 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 "media/gpu/content_video_view_overlay_factory.h"
+
+#include "base/memory/ptr_util.h"
+#include "media/base/surface_manager.h"
+#include "media/gpu/content_video_view_overlay.h"
+
+namespace media {
+
+ContentVideoViewOverlayFactory::ContentVideoViewOverlayFactory(
+    int32_t surface_id)
+    : surface_id_(surface_id) {
+  DCHECK_NE(surface_id_, SurfaceManager::kNoSurfaceID);
+}
+
+ContentVideoViewOverlayFactory::~ContentVideoViewOverlayFactory() {}
+
+std::unique_ptr<AndroidOverlay> ContentVideoViewOverlayFactory::CreateOverlay(
+    const AndroidOverlay::Config& config) {
+  return base::MakeUnique<ContentVideoViewOverlay>(surface_id_, config);
+}
+
+}  // namespace media