fix incorrect about:gpu entry for WebGL2

content/test/gpu/page_sets/gpu_process_tests.py

 # Copyright 2014 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.
 import sys
 from telemetry.story import story_set as story_set_module
 from telemetry.page import page_test
 
 from gpu_tests import gpu_test_base
 
 class GpuProcessSharedPageState(gpu_test_base.GpuSharedPageState):
@@ skipping 538 matching lines @@
       feature_status_list = tab.EvaluateJavaScript(feature_status_js)
       result = True
       for name, status in feature_status_list.items():
         if name == 'multiple_raster_threads':
           result = result and status == 'enabled_on'
         elif name == 'native_gpu_memory_buffers':
           result = result and status == 'disabled_software'
         elif name == 'webgl':
           result = result and status == 'enabled_readback'
         elif name == 'webgl2':
-          result = result and status == 'disabled_off'
+          result = result and status == 'unavailable_off'
         else:
           result = result and status == 'unavailable_software'
       if not result:
         raise page_test.Failure('WebGL readback setup failed: %s' \
           % feature_status_list)
 
 
 class HasTransparentVisualsShared(GpuProcessSharedPageState):
   def __init__(self, test, finder_options, story_set):
     super(HasTransparentVisualsShared, self).__init__(
@@ skipping 192 matching lines @@
 
       # There is currently no entry in kSoftwareRenderingListJson that enables
       # a software GL driver on Android.
       self.AddStory(SoftwareGpuProcessPage(self, expectations))
 
   @property
   def allow_mixed_story_states(self):
     # Return True here in order to be able to run pages with different browser
     # command line arguments.
     return True