Make gpu black list work again on Linux

gpu/config/gpu_switches.cc

 // Copyright 2015 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/config/gpu_switches.h"
 
 namespace switches {
 
 // Pass a set of GpuDriverBugWorkaroundType ids, seperated by ','.
 const char kGpuDriverBugWorkarounds[] = "gpu-driver-bug-workarounds";
 
+// Override os version from GpuControlList::MakeDecision.
+const char kGpuTestingOsVersion[] = "gpu-testing-os-version";
+
+// Override gpu vendor id from the GpuInfoCollector.
+const char kGpuTestingVendorId[] = "gpu-testing-vendor-id";
+
+// Override gpu device id from the GpuInfoCollector.
+const char kGpuTestingDeviceId[] = "gpu-testing-device-id";
+
+// Override gl vendor from the GpuInfoCollector.
+const char kGpuTestingGLVendor[] = "gpu-testing-gl-vendor";
+
+// Override gl renderer from the GpuInfoCollector.
+const char kGpuTestingGLRenderer[] = "gpu-testing-gl-renderer";
+
+// Override gl version from the GpuInfoCollector.
+const char kGpuTestingGLVersion[] = "gpu-testing-gl-version";
+
 }  // namespace switches