Revert of Make lost context and error message callbacks on GpuControl go to client

gpu/gles2_conform_support/egl/display.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 GPU_GLES2_CONFORM_SUPPORT_EGL_DISPLAY_H_
 #define GPU_GLES2_CONFORM_SUPPORT_EGL_DISPLAY_H_
 
 #include <EGL/egl.h>
 #include <stddef.h>
 #include <stdint.h>
@@ skipping 60 matching lines @@
 
   // Context routines.
   bool IsValidContext(EGLContext ctx);
   EGLContext CreateContext(EGLConfig config,
                            EGLContext share_ctx,
                            const EGLint* attrib_list);
   void DestroyContext(EGLContext ctx);
   bool MakeCurrent(EGLSurface draw, EGLSurface read, EGLContext ctx);
 
   // GpuControl implementation.
-  void SetGpuControlClient(gpu::GpuControlClient*) override;
   gpu::Capabilities GetCapabilities() override;
   int32_t CreateImage(ClientBuffer buffer,
                       size_t width,
                       size_t height,
                       unsigned internalformat) override;
   void DestroyImage(int32_t id) override;
   int32_t CreateGpuMemoryBufferImage(size_t width,
                                      size_t height,
                                      unsigned internalformat,
                                      unsigned usage) override;
@@ skipping 36 matching lines @@
   scoped_ptr<Config> config_;
   scoped_ptr<Surface> surface_;
   scoped_ptr<gpu::gles2::GLES2Implementation> context_;
 
   DISALLOW_COPY_AND_ASSIGN(Display);
 };
 
 }  // namespace egl
 
 #endif  // GPU_GLES2_CONFORM_SUPPORT_EGL_DISPLAY_H_