Revert of Move (hopefully) remaining isolate related variables to toolchain.gypi

gypfiles/standalone.gypi

 # Copyright 2012 the V8 project authors. 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
 #       copyright notice, this list of conditions and the following
 #       disclaimer in the documentation and/or other materials provided
@@ skipping 94 matching lines @@
       # Set to 1 to enable fast builds.
       # TODO(machenbach): Only configured for windows.
       'fastbuild%': 0,
 
       # goma settings.
       # 1 to use goma.
       # If no gomadir is set, it uses the default gomadir.
       'use_goma%': 0,
       'gomadir%': '',
 
+      # Check if valgrind directories are present.
+      'has_valgrind%': '<!pymod_do_main(has_valgrind)',
+
       'test_isolation_mode%': 'noop',
 
       'conditions': [
         # Set default gomadir.
         ['OS=="win"', {
           'gomadir': 'c:\\goma\\goma-win',
         }, {
           'gomadir': '<!(/bin/echo -n ${HOME}/goma)',
         }],
         ['host_arch!="ppc" and host_arch!="ppc64" and host_arch!="ppc64le" and host_arch!="s390" and host_arch!="s390x"', {
@@ skipping 29 matching lines @@
     'sanitizer_coverage%': '<(sanitizer_coverage)',
     'use_custom_libcxx%': '<(use_custom_libcxx)',
     'linux_use_bundled_gold%': '<(linux_use_bundled_gold)',
     'use_lto%': '<(use_lto)',
     'cfi_vptr%': '<(cfi_vptr)',
     'cfi_diag%': '<(cfi_diag)',
     'cfi_blacklist%': '<(cfi_blacklist)',
     'test_isolation_mode%': '<(test_isolation_mode)',
     'fastbuild%': '<(fastbuild)',
     'coverage%': '<(coverage)',
+    'has_valgrind%': '<(has_valgrind)',
 
     # Add a simple extras solely for the purpose of the cctests
     'v8_extra_library_files': ['../test/cctest/test-extra.js'],
     'v8_experimental_extra_library_files': ['../test/cctest/test-experimental-extra.js'],
 
     # .gyp files or targets should set v8_code to 1 if they build V8 specific
     # code, as opposed to external code.  This variable is used to control such
     # things as the set of warnings to enable, and whether warnings are treated
     # as errors.
     'v8_code%': 0,
@@ skipping 1249 matching lines @@
               '-fsanitize=cfi-vcall',
               '-fsanitize=cfi-derived-cast',
               '-fsanitize=cfi-unrelated-cast',
             ],
           }],
         ],
       },
     }],
   ],
 }