Don't forbid GPU process if WebGL/WebGL2 is disabled on GPU but not browser.

gpu/config/gpu_util.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_CONFIG_GPU_UTIL_H_
 #define GPU_CONFIG_GPU_UTIL_H_
 
 #include <set>
 #include <string>
 
 #include "base/command_line.h"
 #include "build/build_config.h"
 #include "gpu/gpu_export.h"
 
 namespace base {
 class CommandLine;
 }
 
 namespace gpu {
 
 struct GPUInfo;
 
-// Merge features in src into dst.
-GPU_EXPORT void MergeFeatureSets(
-    std::set<int>* dst, const std::set<int>& src);
-
 // With provided GPUInfo, compute the driver bug workarounds and disabled
 // extensions for the current system, and append the |command_line|.
 GPU_EXPORT void ApplyGpuDriverBugWorkarounds(
     const GPUInfo& gpu_info,
     base::CommandLine* command_line);
 
 // |str| is in the format of "feature1,feature2,...,featureN".
 GPU_EXPORT void StringToFeatureSet(
     const std::string& str, std::set<int>* feature_set);
 
 // With provided command line, fill gpu_info->secondary_gpus with parsed
 // secondary vendor and device ids.
 GPU_EXPORT void ParseSecondaryGpuDevicesFromCommandLine(
     const base::CommandLine& command_line,
     GPUInfo* gpu_info);
 
 GPU_EXPORT void InitializeDualGpusIfSupported(
     const std::set<int>& driver_bug_workarounds);
 
 }  // namespace gpu
 
 #endif  // GPU_CONFIG_GPU_UTIL_H_