gpu: Add CHROMIUM_copy_image extension.

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 197 matching lines @@
 
   // Returns true if SwapBuffers or PostSubBuffers causes a flip, such that
   // the next buffer may be 2 frames old.
   virtual bool BuffersFlipped() const;
 
   static GLSurface* GetCurrent();
 
   // Called when the swap interval for the associated context changes.
   virtual void OnSetSwapInterval(int interval);
 
+  // Returns whether IsertFence() is supported.
+  virtual bool SupportsInsertFence();
+
+  // Insert fence and run |callback| when fence has signaled. The callback
+  // should be run on the calling thread (i.e. same thread InsertFence is
+  // called)
+  virtual void InsertFence(const base::Closure& callback);
+
  protected:
   virtual ~GLSurface();
 
   static void SetCurrent(GLSurface* surface);
 
   static bool ExtensionsContain(const char* extensions, const char* name);
 
  private:
   friend class base::RefCounted<GLSurface>;
   friend class GLContext;
@@ skipping 47 matching lines @@
   GLSurface::Format GetFormat() override;
   gfx::VSyncProvider* GetVSyncProvider() override;
   bool ScheduleOverlayPlane(int z_order,
                             gfx::OverlayTransform transform,
                             GLImage* image,
                             const gfx::Rect& bounds_rect,
                             const gfx::RectF& crop_rect) override;
   bool IsSurfaceless() const override;
   bool FlipsVertically() const override;
   bool BuffersFlipped() const override;
+  bool SupportsInsertFence() override;
+  void InsertFence(const base::Closure& callback) override;
 
   GLSurface* surface() const { return surface_.get(); }
 
  protected:
   ~GLSurfaceAdapter() override;
 
  private:
   scoped_refptr<GLSurface> surface_;
 
   DISALLOW_COPY_AND_ASSIGN(GLSurfaceAdapter);
 };
 
 // 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_