Make the warning level consistent across the project

Source/testing/testing.gyp

 #
 # Copyright (C) 2011 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 36 matching lines @@
     ],
     'targets': [
         {
             'target_name': 'TestRunner',
             'type': '<(component)',
             'defines': [
                 'WEBTESTRUNNER_IMPLEMENTATION=1',
             ],
             'dependencies': [
                 'TestRunner_resources',
+                '../config.gyp:unittest_config',
                 '../../public/blink.gyp:blink',
                 '<(source_dir)/web/web.gyp:webkit_test_support',
             ],
             'export_dependent_settings': [
                 '../../public/blink.gyp:blink',
             ],
             'direct_dependent_settings': {
                 'include_dirs': [
                     '../..',
                 ],
@@ skipping 167 matching lines @@
                         ]
                     }],
                 }],
             ],
         },
         {
             'target_name': 'TestNetscapePlugIn',
             'type': 'loadable_module',
             'sources': [ '<@(test_plugin_files)' ],
             'dependencies': [
+                '../config.gyp:unittest_config',
                 '<(DEPTH)/third_party/npapi/npapi.gyp:npapi',
             ],
             'include_dirs': [
                 '<(DEPTH)',
                 '<(source_dir)/testing/plugin/',
             ],
             'conditions': [
                 ['OS=="mac"', {
                     'mac_bundle': 1,
                     'product_extension': 'plugin',
@@ skipping 90 matching lines @@
             'target_defaults': {
                 # FIXME: Add -Wglobal-constructors after fixing existing bugs.
                 'cflags': ['-Wunused-parameter'],
                 'xcode_settings': {
                     'WARNING_CFLAGS': ['-Wunused-parameter'],
                 },
             },
         }],
     ], # conditions
 }