Enable Accelerated Video Decode in Linux

content/content_tests.gypi

 # 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.
 
 {
   'variables': {
     'layouttest_support_content_sources': [
       'public/test/layouttest_support.h',
       'public/test/nested_message_pump_android.cc',
       'public/test/nested_message_pump_android.h',
@@ skipping 1766 matching lines @@
                   '../ui/display/display.gyp:display',  # Used by rendering_helper.cc
                   '../ui/ozone/ozone.gyp:ozone',  # Used by rendering_helper.cc
                 ],
               }],
             ],
             # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
             'msvs_disabled_warnings': [ 4267, ],
           },
         ]
     }],
-    ['chromeos==1 and target_arch != "arm"', {
+    ['OS=="linux" and target_arch != "arm"', {
       'targets': [
           {
             'target_name': 'vaapi_jpeg_decoder_unittest',
             'type': '<(gtest_target_type)',
             'dependencies': [
               'content.gyp:content_common',
               '../base/base.gyp:base',
               '../media/media.gyp:media',
               '../media/media.gyp:media_test_support',
               '../testing/gtest.gyp:gtest',
@@ skipping 11 matching lines @@
                 ]
               }, {
                 'dependencies': [
                   '../build/linux/system.gyp:libdrm',
                 ]
               }],
             ],
           }
         ]
     }],
-    ['chromeos==1', {
+    ['chromeos==1 or (OS=="linux" and target_arch != "arm")', {
       'targets': [
         {
           'target_name': 'video_encode_accelerator_unittest',
           'type': 'executable',
           'dependencies': [
             '../base/base.gyp:base',
             '../media/media.gyp:media',
             '../media/media.gyp:media_test_support',
             '../testing/gtest.gyp:gtest',
             '../ui/base/ui_base.gyp:ui_base',
@@ skipping 415 matching lines @@
                   'content_unittests_apk.isolate',
                 ],
               },
             ],
           },
         ],
       ],
     }],
   ],
 }