Reland "Use v8 Microtask Queue"

Source/wtf/LeakAnnotations.h

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  * Copyright (C) 2013 Samsung Electronics. 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.
@@ skipping 55 matching lines @@
         __lsan_disable();
     }
 
     ~LeakSanitizerDisabler()
     {
         __lsan_enable();
     }
 };
 
 #define WTF_ANNOTATE_SCOPED_MEMORY_LEAK \
-    LeakSanitizerDisabler leakSanitizerDisabler; static_cast<void>(0)
+        WTF::LeakSanitizerDisabler leakSanitizerDisabler; static_cast<void>(0)
 
 #define WTF_ANNOTATE_LEAKING_OBJECT_PTR(X) \
-    __lsan_ignore_object(X)
+    WTF::__lsan_ignore_object(X)
 
 #else // USE(LEAK_SANITIZER)
 
 // If Leak Sanitizer is not being used, the annotations should be no-ops.
 #define WTF_ANNOTATE_SCOPED_MEMORY_LEAK
 #define WTF_ANNOTATE_LEAKING_OBJECT_PTR(X)
 
 #endif // USE(LEAK_SANITIZER)
 
 } // namespace WTF
 
 #endif // WTF_LeakAnnotations_h