Fixes to make GPU tests run in isolated mode.

tools/telemetry/telemetry.gyp

 # 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.
 
 {
   'targets' : [
     {
       'target_name': 'bitmaptools',
       'type': 'none',
       'variables': {
         'output_path': '<(PRODUCT_DIR)',
       },
       'conditions': [
         ['OS=="android" or OS=="linux" or OS=="mac"', {
           'variables': {
             'python_extension': '.so'
           },
         }],
         ['OS=="win"', {
           'variables': {
             'python_extension': '.pyd'
           },
         }],
-        ['OS=="android" or OS=="linux" or OS=="mac" or OS=="win"', {
+        ['OS=="android" or OS=="linux" or OS=="win"', {
           'actions': [{
             'action_name': 'bitmaptools',
             'inputs': [
               'telemetry/core/build_extension.py',
               'telemetry/core/bitmaptools/bitmaptools.cc',
             ],
             'outputs': [
               '<(output_path)/bitmaptools>(python_extension)'
             ],
             'action': [
               'python',
               '<@(_inputs)',
               '<(output_path)',
               'bitmaptools',
             ]
           }],
         }],
       ]
     },
   ],
 }