Add a new command buffer function glScheduleCALayerInUseQueryCHROMIUM.

gpu/ipc/service/image_transport_surface_overlay_mac.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 GPU_IPC_SERVICE_IMAGE_TRANSPORT_SURFACE_OVERLAY_MAC_H_
 #define GPU_IPC_SERVICE_IMAGE_TRANSPORT_SURFACE_OVERLAY_MAC_H_
 
 #include <list>
 #include <memory>
 #include <vector>
@@ skipping 48 matching lines @@
                        const gfx::RectF& contents_rect,
                        float opacity,
                        unsigned background_color,
                        unsigned edge_aa_mask,
                        const gfx::RectF& rect,
                        bool is_clipped,
                        const gfx::RectF& clip_rect,
                        const gfx::Transform& transform,
                        int sorting_context_id,
                        unsigned filter) override;
+  void ScheduleCALayerInUseQuery(
+      std::vector<CALayerInUseQuery> queries) override;
   bool IsSurfaceless() const override;
 
   // ui::GpuSwitchingObserver implementation.
   void OnGpuSwitched() override;
 
  private:
   ~ImageTransportSurfaceOverlayMac() override;
 
   void SetLatencyInfo(const std::vector<ui::LatencyInfo>& latency_info);
   void SendAcceleratedSurfaceBuffersSwapped(
@@ skipping 12 matching lines @@
   std::vector<ui::LatencyInfo> latency_info_;
 
   bool use_remote_layer_api_;
   base::scoped_nsobject<CAContext> ca_context_;
   base::scoped_nsobject<CAContext> fullscreen_low_power_ca_context_;
   std::unique_ptr<ui::CALayerTreeCoordinator> ca_layer_tree_coordinator_;
 
   gfx::Size pixel_size_;
   float scale_factor_;
 
+  struct IOSurfaceInUseQuery {
+    IOSurfaceInUseQuery();
+    explicit IOSurfaceInUseQuery(const IOSurfaceInUseQuery&);
+    explicit IOSurfaceInUseQuery(IOSurfaceInUseQuery&&);
+    ~IOSurfaceInUseQuery();
+
+    // It's possible that the client will have destroyed the texture before
+    // SwapBuffersInternal is called. It's important that |texture| is only used
+    // as an opaque identifier, since it may no longer point to the same
+    // texture.
+    unsigned texture = 0;
+    base::ScopedCFTypeRef<IOSurfaceRef> io_surface;
+  };
+  std::vector<IOSurfaceInUseQuery> io_surface_in_use_queries_;
+
   // A GLFence marking the end of the previous frame. Must only be accessed
   // while in a ScopedSetGLToRealGLApi, and while the associated
   // |previous_frame_context_| is bound.
   std::unique_ptr<gl::GLFence> previous_frame_fence_;
   base::ScopedTypeRef<CGLContextObj> fence_context_obj_;
 
   // The renderer ID that all contexts made current to this surface should be
   // targeting.
   GLint gl_renderer_id_;
 };
 
 }  // namespace gpu
 
 #endif  // GPU_IPC_SERVICE_IMAGE_TRANSPORT_SURFACE_OVERLAY_MAC_H_