Remove setErrorMessageCallback from WebGraphicsContext3D.

cc/test/test_context_support.cc

 // Copyright 2013 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 "cc/test/test_context_support.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include "base/bind.h"
@@ skipping 70 matching lines @@
                                          display_bounds,
                                          uv_rect);
   }
 }
 
 uint64_t TestContextSupport::ShareGroupTracingGUID() const {
   NOTIMPLEMENTED();
   return 0;
 }
 
+void TestContextSupport::SetErrorMessageCallback(
+    const base::Callback<void(const char*, int32_t)>& callback) {}
+
 }  // namespace cc