command_buffer: Remove dead code for gl_begin_gl_end_on_fbo_change_to_backbuffer workaround

ui/gl/gl_surface.cc

 // 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.
 
 #include "ui/gl/gl_surface.h"
 
 #include <vector>
 
 #include "base/command_line.h"
 #include "base/lazy_instance.h"
@@ skipping 147 matching lines @@
 
 void GLSurface::CommitOverlayPlanesAsync(
     const SwapCompletionCallback& callback) {
   NOTREACHED();
 }
 
 bool GLSurface::OnMakeCurrent(GLContext* context) {
   return true;
 }
 
-void GLSurface::NotifyWasBound() {
-}
-
 bool GLSurface::SetBackbufferAllocation(bool allocated) {
   return true;
 }
 
 void GLSurface::SetFrontbufferAllocation(bool allocated) {
 }
 
 void* GLSurface::GetShareHandle() {
   NOTIMPLEMENTED();
   return NULL;
@@ skipping 218 matching lines @@
   return surface_->FlipsVertically();
 }
 
 bool GLSurfaceAdapter::BuffersFlipped() const {
   return surface_->BuffersFlipped();
 }
 
 GLSurfaceAdapter::~GLSurfaceAdapter() {}
 
 }  // namespace gfx