Don't check IOSurfaceIsInUse for IOSurfaces wrapped in a CVPixelBuffer.

ui/gl/gl_image_io_surface.h

 // Copyright 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.
 
 #ifndef UI_GL_GL_IMAGE_IO_SURFACE_H_
 #define UI_GL_GL_IMAGE_IO_SURFACE_H_
 
 #include <CoreVideo/CVPixelBuffer.h>
 #include <IOSurface/IOSurface.h>
 #include <stdint.h>
@@ skipping 47 matching lines @@
                             const gfx::RectF& crop_rect) override;
   void OnMemoryDump(base::trace_event::ProcessMemoryDump* pmd,
                     uint64_t process_tracing_id,
                     const std::string& dump_name) override;
   bool EmulatingRGB() const override;
 
   gfx::GenericSharedMemoryId io_surface_id() const { return io_surface_id_; }
   base::ScopedCFTypeRef<IOSurfaceRef> io_surface();
   base::ScopedCFTypeRef<CVPixelBufferRef> cv_pixel_buffer();
 
+  // Whether checking IOSurfaceIsInUse() will actually provide a meaningful
+  // signal about whether the Window Server is still using the IOSurface.
+  bool CanCheckIOSurfaceIsInUse() const;
+
   static unsigned GetInternalFormatForTesting(gfx::BufferFormat format);
 
  protected:
   ~GLImageIOSurface() override;
 
  private:
   class RGBConverter;
 
   const gfx::Size size_;
 
   // The "internalformat" exposed to the command buffer, which may not be
   // "internalformat" requested by the client.
   const unsigned internalformat_;
 
   // The "internalformat" requested by the client.
   const unsigned client_internalformat_;
 
   gfx::BufferFormat format_;
   base::ScopedCFTypeRef<IOSurfaceRef> io_surface_;
   base::ScopedCFTypeRef<CVPixelBufferRef> cv_pixel_buffer_;
   gfx::GenericSharedMemoryId io_surface_id_;
   base::ThreadChecker thread_checker_;
 
   DISALLOW_COPY_AND_ASSIGN(GLImageIOSurface);
 };
 
 }  // namespace gl
 
 #endif  // UI_GL_GL_IMAGE_IO_SURFACE_H_