Revert workaround due to perf regression

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>.
 
 #include "gpu/config/gpu_control_list_jsons.h"
 
 #define LONG_STRING_CONST(...) #__VA_ARGS__
 
 namespace gpu {
 
 const char kGpuDriverBugListJson[] = LONG_STRING_CONST(
 
 {
   "name": "gpu driver bug list",
   // Please update the version number whenever you change this file.
-  "version": "9.18",
+  "version": "9.19",
   "entries": [
     {
       "id": 1,
       "description": "Imagination driver doesn't like uploading lots of buffer data constantly",
       "os": {
         "type": "android"
       },
       "gl_vendor": "Imagination.*",
       "features": [
         "use_client_side_arrays_for_stream_buffers"
@@ skipping 2169 matching lines @@
         "type": "linux"
       },
       "driver_vendor": "Mesa",
       "gl_version": {
         "op": "=",
         "value": "3.3"
       },
       "features": [
         "remove_invariant_and_centroid_for_essl3"
       ]
-    },
-    {
-      "id": 204,
-      "cr_bugs": [665656],
-      "description": "Hardware readback from 2D canvas to WebGL texture is flaky on Mac Intel",
-      "os": {
-        "type": "macosx"
-      },
-      "vendor_id": "0x8086",
-      "features": [
-        "force_software_readback_from_2d_canvas"
-      ]
     }
   ]
   // Please update the version number at beginning of this file whenever you
   // change this file.
 }
 
 );  // LONG_STRING_CONST macro
 
 }  // namespace gpu