Enable SurfaceView fullscreen video on Android with WebMediaPlayerImpl

media/base/surface_manager.h

+// 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.
+
+#ifndef MEDIA_BASE_SURFACE_MANAGER_H_
+#define MEDIA_BASE_SURFACE_MANAGER_H_
+
+#include "base/callback.h"
+#include "base/macros.h"
+#include "media/base/media_export.h"
+#include "ui/gfx/geometry/size.h"
+
+namespace media {
+
+using SurfaceCreatedCB = base::Callback<void(int)>;
+using RequestSurfaceCB = base::Callback<void(const SurfaceCreatedCB&)>;
+
+class MEDIA_EXPORT SurfaceManager {
+ public:
+  enum { kNoSurfaceID = -1 };
+
+  SurfaceManager() {}
+  virtual ~SurfaceManager() {}
+
+  // Create a fullscreen surface. The id will be returned with
+  // |surface_created_cb|. If this is called more than once before the first
+  // |surface_created_cb| is called, the surface will be delivered to the last
+  // caller. If this is called after the fullscreen surface is created, the
+  // existing surface will be returned. The client should ensure that the
+  // previous consumer is no longer using the surface.
+  virtual void CreateFullscreenSurface(
+      const gfx::Size& video_natural_size,
+      const SurfaceCreatedCB& surface_created_cb) = 0;
+
+  // Call this when the natural size of the fullscreen video changes. The
+  // surface will be resized to match the aspect ratio.
+  virtual void NaturalSizeChanged(const gfx::Size& size) = 0;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(SurfaceManager);
+};
+
+}  // namespace media
+
+#endif  // MEDIA_BASE_SURFACE_MANAGER_H_