Disable KHR_blend_equation_advanced(_coherent) until cc shaders are updated

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": "9.20",
+  "version": "9.21",
   "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 2185 matching lines @@
         "type": "android",
         "version": {
           "op": "=",
           "value": "7.1"
         }
       },
       "gl_renderer": "Adreno \\(TM\\) 5.*",
       "disabled_extensions": [
         "GL_EXT_multisampled_render_to_texture"
       ]
+    },
+    {
+      "id": 206,
+      "description": "Disable KHR_blend_equation_advanced until cc shaders are updated",
+      "cr_bugs": [661715],
+      "disabled_extensions": [
+        "GL_KHR_blend_equation_advanced",
+        "GL_KHR_blend_equation_advanced_coherent"
+      ]
     }
   ]
   // Please update the version number at beginning of this file whenever you
   // change this file.
 }
 
 );  // LONG_STRING_CONST macro
 
 }  // namespace gpu