NOT for review (for discussion): Query IOSurfaceIsInUse in the browser process

ui/gl/gl_surface.h

 // Copyright (c) 2012 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_SURFACE_H_
 #define UI_GL_GL_SURFACE_H_
 
 #include <string>
 
 #include "base/callback.h"
@@ skipping 180 matching lines @@
   // Schedule a CALayer to be shown at swap time.
   // All arguments correspond to their CALayer properties.
   virtual bool ScheduleCALayer(const ui::CARendererLayerParams& params);
 
   struct GL_EXPORT CALayerInUseQuery {
     CALayerInUseQuery();
     explicit CALayerInUseQuery(const CALayerInUseQuery&);
     ~CALayerInUseQuery();
     unsigned texture = 0;
     scoped_refptr<GLImage> image;
+    bool needs_gpu_memory_buffer_handle = false;
   };
   virtual void ScheduleCALayerInUseQuery(
       std::vector<CALayerInUseQuery> queries);
 
   virtual bool IsSurfaceless() const;
 
   virtual bool FlipsVertically() const;
 
   // Returns true if SwapBuffers or PostSubBuffers causes a flip, such that
   // the next buffer may be 2 frames old.
@@ skipping 85 matching lines @@
 
 // Wraps GLSurface in scoped_refptr and tries to initializes it. Returns a
 // scoped_refptr containing the initialized GLSurface or nullptr if
 // initialization fails.
 GL_EXPORT scoped_refptr<GLSurface> InitializeGLSurface(
     scoped_refptr<GLSurface> surface);
 
 }  // namespace gl
 
 #endif  // UI_GL_GL_SURFACE_H_