Remove callbacks for SurfaceFactoryOzone::LoadEGLGLES2Bindings().

ui/ozone/platform/caca/caca_window_manager.h

 // Copyright 2014 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_OZONE_PLATFORM_CACA_CACA_WINDOW_MANAGER_H_
 #define UI_OZONE_PLATFORM_CACA_CACA_WINDOW_MANAGER_H_
 
 #include <stdint.h>
 
 #include <memory>
@@ skipping 16 matching lines @@
   CacaWindowManager();
   ~CacaWindowManager() override;
 
   // Register a new libcaca window/instance. Returns the window id.
   int32_t AddWindow(CacaWindow* window);
 
   // Remove a libcaca window/instance.
   void RemoveWindow(int32_t window_id, CacaWindow* window);
 
   // ui::SurfaceFactoryOzone overrides:
-  bool LoadEGLGLES2Bindings(
-      AddGLLibraryCallback add_gl_library,
-      SetGLGetProcAddressProcCallback set_gl_get_proc_address) override;
   std::unique_ptr<SurfaceOzoneCanvas> CreateCanvasForWidget(
       gfx::AcceleratedWidget widget) override;
 
  private:
   IDMap<CacaWindow> windows_;
   base::ThreadChecker thread_checker_;
 
   DISALLOW_COPY_AND_ASSIGN(CacaWindowManager);
 };
 
 }  // namespace ui
 
 #endif  // UI_OZONE_PLATFORM_CACA_CACA_WINDOW_MANAGER_H_