ui: Enable virtual contexts for linux

gpu/config/gpu_driver_bug_list_json.cc

 // Copyright (c) 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.
 
 // Determines whether a certain driver bug exists in the current system.
 // The format of a valid gpu_driver_bug_list.json file is defined in
 // <gpu/config/gpu_control_list_format.txt>.
 // The supported "features" can be found in
 // <gpu/config/gpu_driver_bug_workaround_type.h>.
 
@@ skipping 1199 matching lines @@
       "id": 105,
       "cr_bugs": [449488,451230],
       "description": "Framebuffer discarding causes corruption on Mali-4xx",
       "gl_renderer": "Mali-4.*",
       "os": {
         "type": "android"
       },
       "features": [
         "disable_discard_framebuffer"
       ]
+    },
+    {
+      "id": 106,
+      "description": "MakeCurrent is slow on Linux",
+      "os": {
+        "type": "linux"
+      },
+      "features": [
+        "use_virtualized_gl_contexts"
+      ]
     }
   ]
 }
 
 );  // LONG_STRING_CONST macro
 
 }  // namespace gpu