mac: Remove GPU bug workarounds for OS X versions before 10.9

gpu/config/gpu_driver_bug_list.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.
 
 #include "gpu/config/gpu_driver_bug_list.h"
 
 #include "base/logging.h"
 #include "gpu/config/gpu_driver_bug_workaround_type.h"
 #include "gpu/config/gpu_switches.h"
 #include "gpu/config/gpu_util.h"
@@ skipping 68 matching lines @@
       // Removing conflicting workarounds.
       switch (kFeatureList[i].type) {
         case FORCE_DISCRETE_GPU:
           workarounds->erase(FORCE_INTEGRATED_GPU);
           workarounds->insert(FORCE_DISCRETE_GPU);
           break;
         case FORCE_INTEGRATED_GPU:
           workarounds->erase(FORCE_DISCRETE_GPU);
           workarounds->insert(FORCE_INTEGRATED_GPU);
           break;
-        case MAX_CUBE_MAP_TEXTURE_SIZE_LIMIT_512:
-        case MAX_CUBE_MAP_TEXTURE_SIZE_LIMIT_1024:
-        case MAX_CUBE_MAP_TEXTURE_SIZE_LIMIT_4096:
-          workarounds->erase(MAX_CUBE_MAP_TEXTURE_SIZE_LIMIT_512);
-          workarounds->erase(MAX_CUBE_MAP_TEXTURE_SIZE_LIMIT_1024);
-          workarounds->erase(MAX_CUBE_MAP_TEXTURE_SIZE_LIMIT_4096);
-          workarounds->insert(kFeatureList[i].type);
-          break;
         default:
           workarounds->insert(kFeatureList[i].type);
           break;
       }
     }
   }
 }
 
 }  // namespace gpu