Garcefully handle glCreateGpuMemoryBufferImageCHROMIUM failure.

media/renderers/video_overlay_factory.h

 // Copyright 2015 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_RENDERERS_VIDEO_OVERLAY_FACTORY_H_
 #define MEDIA_RENDERERS_VIDEO_OVERLAY_FACTORY_H_
 
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "media/base/media_export.h"
@@ skipping 13 matching lines @@
 class MEDIA_EXPORT VideoOverlayFactory {
  public:
   explicit VideoOverlayFactory(
       ::media::GpuVideoAcceleratorFactories* gpu_factories);
   ~VideoOverlayFactory();
 
   scoped_refptr<::media::VideoFrame> CreateFrame(const gfx::Size& size);
 
  private:
   class Texture;
+  Texture* GetTexture();
+
   ::media::GpuVideoAcceleratorFactories* gpu_factories_;
   std::unique_ptr<Texture> texture_;
 
   DISALLOW_COPY_AND_ASSIGN(VideoOverlayFactory);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_RENDERERS_VIDEO_OVERLAY_FACTORY_H_