Refactor TimeBase to post tasks. Workers to use real Idle tasks.

Source/platform/blink_platform_tests.gyp

 #
 # Copyright (C) 2013 Google Inc. All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 # notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
@@ skipping 63 matching lines @@
       ],
     },
     {
       'target_name': 'blink_platform_unittests',
       'type': 'executable',
       'dependencies': [
         '../config.gyp:unittest_config',
         '../wtf/wtf.gyp:wtf',
         '../wtf/wtf_tests.gyp:wtf_unittest_helpers',
         '<(DEPTH)/base/base.gyp:test_support_base',
+        '<(DEPTH)/content/content_shell_and_tests.gyp:test_support_content',
         '<(DEPTH)/skia/skia.gyp:skia',
         '<(DEPTH)/third_party/harfbuzz-ng/harfbuzz.gyp:harfbuzz-ng',
         '<(DEPTH)/url/url.gyp:url_lib',
         'blink_platform.gyp:blink_common',
         'blink_platform.gyp:blink_platform',
       ],
       'defines': [
         'INSIDE_BLINK',
       ],
       'include_dirs': [
@@ skipping 73 matching lines @@
           'blink_platform_unittests',
         ],
         'variables': {
           'test_suite_name': 'blink_platform_unittests',
         },
         'includes': [ '../../../../build/apk_test.gypi' ],
       }],
     }],
   ],
 }