gpu: Add CHROMIUM_copy_image extension.

ui/gl/gl_surface_egl.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_EGL_H_
 #define UI_GL_GL_SURFACE_EGL_H_
 
 #if defined(OS_WIN)
 #include <windows.h>
 #endif
 
 #include <memory>
 #include <string>
 #include <vector>
 
 #include "base/command_line.h"
 #include "base/compiler_specific.h"
 #include "base/macros.h"
+#include "base/memory/ref_counted.h"
+#include "base/memory/weak_ptr.h"
 #include "base/time/time.h"
 #include "build/build_config.h"
 #include "ui/gfx/geometry/size.h"
 #include "ui/gfx/vsync_provider.h"
 #include "ui/gl/gl_bindings.h"
 #include "ui/gl/gl_export.h"
 #include "ui/gl/gl_surface.h"
 #include "ui/gl/gl_surface_overlay.h"
 #include "ui/gl/sync_control_vsync_provider.h"
 
@@ skipping 195 matching lines @@
   void Destroy() override;
   bool IsOffscreen() override;
   bool IsSurfaceless() const override;
   gfx::SwapResult SwapBuffers() override;
   gfx::Size GetSize() override;
   bool Resize(const gfx::Size& size,
               float scale_factor,
               bool has_alpha) override;
   EGLSurface GetHandle() override;
   void* GetShareHandle() override;
+  bool SupportsInsertFence() override;
+  void InsertFence(const base::Closure& callback) override;
 
  protected:
   ~SurfacelessEGL() override;
 
+  bool InsertSyncFence(const EGLint* attribs, const base::Closure& callback);
+
  private:
+  class EGLWaitSyncFenceThread;
+
+  void FenceRetired(EGLSyncKHR fence, const base::Closure& callback);
+
   gfx::Size size_;
+  scoped_refptr<EGLWaitSyncFenceThread> wait_sync_fence_thread_;
+  base::WeakPtrFactory<SurfacelessEGL> weak_ptr_factory_;
+
   DISALLOW_COPY_AND_ASSIGN(SurfacelessEGL);
 };
 
 }  // namespace gl
 
 #endif  // UI_GL_GL_SURFACE_EGL_H_