Backed out changeset 091c5613b5cf (bug 1370644) for failing GTest XPCOMDeadlockDetectorTest.XPCOMSanity3DeathTest | Death test: Sanity3_Child(). r=backout

xpcom/threads/BlockingResourceBase.cpp

@@ -301,12 +301,11 @@ BlockingResourceBase::CheckAcquire()
     out.AppendLiteral("\nDeadlock may happen for some other execution\n\n");
   }
 
-  // Only error out if we think a deadlock is imminent.
-  if (maybeImminent) {
-    NS_ERROR(out.get());
-  } else {
-    NS_WARNING(out.get());
-  }
+  // XXX can customize behavior on whether we /think/ deadlock is
+  // XXX about to happen.  for example:
+  // XXX   if (maybeImminent)
+  //           NS_RUNTIMEABORT(out.get());
+  NS_ERROR(out.get());
 }