Change gpu blacklists from json resource to const string.

content/content_unittests.isolate

 # 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.
 {
   'conditions': [
     ['OS=="linux"', {
       'variables': {
         'command': [
           '../testing/xvfb.py',
           '<(PRODUCT_DIR)',
           '../tools/swarm_client/run_test_cases.py',
           '<(PRODUCT_DIR)/content_unittests<(EXECUTABLE_SUFFIX)',
         ],
         'isolate_dependency_untracked': [
           '<(PRODUCT_DIR)/libffmpegsumo.so',
           '<(PRODUCT_DIR)/test_data/',
         ],
       },
     }],
     ['OS=="linux" or OS=="mac" or OS=="win"', {
       'variables': {
         'isolate_dependency_tracked': [
           '<(PRODUCT_DIR)/content_unittests<(EXECUTABLE_SUFFIX)',
         ],
         'isolate_dependency_untracked': [
           '../third_party/hyphen/hyph_en_US.dic',
           '../webkit/data/',
-          'browser/gpu/gpu_driver_bug_list.json',
-          'browser/gpu/gpu_switching_list.json',
-          'browser/gpu/software_rendering_list.json',
           'test/data/',
         ],
       },
     }],
     ['OS=="mac"', {
       'variables': {
         'isolate_dependency_untracked': [
           '<(PRODUCT_DIR)/content_resources.pak',
           '<(PRODUCT_DIR)/ffmpegsumo.so',
         ],
@@ skipping 11 matching lines @@
     ['OS=="win"', {
       'variables': {
         'isolate_dependency_untracked': [
           '<(PRODUCT_DIR)/ffmpegsumo.dll',
           '<(PRODUCT_DIR)/icudt.dll',
         ],
       },
     }],
   ],
 }