Remove setErrorMessageCallback from WebGraphicsContext3D.

gpu/blink/webgraphicscontext3d_in_process_command_buffer_impl.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 "gpu/blink/webgraphicscontext3d_in_process_command_buffer_impl.h"
 
 #include <GLES2/gl2.h>
 #include <utility>
 #ifndef GL_GLEXT_PROTOTYPES
 #define GL_GLEXT_PROTOTYPES 1
@@ skipping 46 matching lines @@
         const gpu::gles2::ContextCreationAttribHelper& attributes,
         bool is_offscreen,
         gfx::AcceleratedWidget window)
     : attributes_(attributes),
       is_offscreen_(is_offscreen),
       window_(window),
       context_(std::move(context)) {}
 
 WebGraphicsContext3DInProcessCommandBufferImpl::
     ~WebGraphicsContext3DInProcessCommandBufferImpl() {
-  if (real_gl_) {
-    real_gl_->SetErrorMessageCallback(
-        base::Callback<void(const char*, int32_t)>());
+  if (real_gl_)
     real_gl_->SetLostContextCallback(base::Closure());
-  }
 }
 
 size_t WebGraphicsContext3DInProcessCommandBufferImpl::GetMappedMemoryLimit() {
   return context_->GetMappedMemoryLimit();
 }
 
 bool WebGraphicsContext3DInProcessCommandBufferImpl::MaybeInitializeGL() {
   if (initialized_)
     return true;
 
@@ skipping 42 matching lines @@
 void WebGraphicsContext3DInProcessCommandBufferImpl::SetLock(base::Lock* lock) {
   context_->SetLock(lock);
 }
 
 ::gpu::ContextSupport*
 WebGraphicsContext3DInProcessCommandBufferImpl::GetContextSupport() {
   return real_gl_;
 }
 
 }  // namespace gpu_blink