Enable ASSERT when DCHECK_ALWAYS_ON is defined.

Source/web/web_tests.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 13 matching lines @@
 # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #
 
 {
     'includes': [
         '../bindings/bindings.gypi',
+        '../build/defines_from_chromium.gypi',
         '../build/features.gypi',
         '../build/scripts/scripts.gypi',
         '../core/core.gypi',
         '../modules/modules.gypi',
         '../web/web.gypi',
         '../wtf/wtf.gypi',
     ],
     'targets': [
         {
             'target_name': 'webkit_unit_tests_resources',
@@ skipping 150 matching lines @@
                 ],
                 'variables': {
                     'test_suite_name': 'webkit_unit_tests',
                     'input_shlib_path': '<(SHARED_LIB_DIR)/<(SHARED_LIB_PREFIX)webkit_unit_tests<(SHARED_LIB_SUFFIX)',
                 },
                 'includes': [ '../../../../build/apk_test.gypi' ],
             }],
         }],
     ],
 }