Remove linux x86 from HW video decode black list

gpu/config/software_rendering_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 certain gpu-related features are blacklisted or not.
 // The format of a valid software_rendering_list.json file is defined in
 // <gpu/config/gpu_control_list_format.txt>.
 // The supported "features" can be found in <gpu/config/gpu_blacklist.cc>.
 
 #include "gpu/config/gpu_control_list_jsons.h"
@@ skipping 525 matching lines @@
       "driver_version": {
         "op": "<",
         "value": "295"
       },
       "features": [
         "all"
       ]
     },
     {
       "id": 48,
-      "description": "Accelerated video decode is unavailable on Mac and Linux",
-      "cr_bugs": [137247, 133828],
+      "description": "Accelerated video decode is unavailable on Mac",
+      "cr_bugs": [133828],
       "exceptions": [
         {
           "os": {
             "type": "chromeos"
           }
         },
         {
           "os": {
+            "type": "linux"
+          }
+        },
+        {
+          "os": {
             "type": "win"
           }
         },
         {
           "os": {
             "type": "android"
           }
         }
       ],
       "features": [
@@ skipping 545 matching lines @@
       "features": [
         "all"
       ]
     }
   ]
 }
 
 );  // LONG_STRING_CONST macro
 
 }  // namespace gpu