Issue #3593, #1197- fix isolate management

libadblockplus.gyp

 {
   'conditions': [[
     # We don't want to use curl on Windows and Android, skip the check there
     'OS=="win" or OS=="android"',
     {
       'variables': {
         'have_curl': 0
       }
     },
     {
@@ skipping 144 matching lines @@
     }]
   },
   {
     'target_name': 'tests',
     'type': 'executable',
     'dependencies': [
       'third_party/googletest.gyp:googletest_main',
       'libadblockplus'
     ],
     'sources': [
+      'test/BaseJsTest.h',
+      'test/BaseJsTest.cpp',
       'test/AppInfoJsObject.cpp',
       'test/ConsoleJsObject.cpp',
       'test/DefaultFileSystem.cpp',
       'test/FileSystemJsObject.cpp',
       'test/FilterEngine.cpp',
       'test/GlobalJsObject.cpp',
       'test/JsEngine.cpp',
       'test/JsValue.cpp',
       'test/Notification.cpp',
       'test/Prefs.cpp',
       'test/ReferrerMapping.cpp',
       'test/Thread.cpp',
       'test/UpdateCheck.cpp',
       'test/WebRequest.cpp'
     ],
     'msvs_settings': {
       'VCLinkerTool': {
         'SubSystem': '1',   # Console
         'EntryPointSymbol': 'mainCRTStartup',
       },
     },
   }]
 }