Wait in heap tests for active concurrent sweeper threads.

src/mark-compact.h

Index: src/mark-compact.h
diff --git a/src/mark-compact.h b/src/mark-compact.h
index b4199a3f570fd8f2c5316d245d58934b64e4bce1..5920fbda7e19944a6ee59447fd4445559e331aff 100644
--- a/src/mark-compact.h
+++ b/src/mark-compact.h
@@ -698,6 +698,10 @@ class MarkCompactCollector {
     return sequential_sweeping_;
   }
 
+  bool sweeping_pending() const {

[Michael Starzinger, 2013/03/11 09:50:26]

Drop this in favor of IsConcurrentSweepingInProgress().

[Hannes Payer (out of office), 2013/03/11 10:14:52]

Done.

+    return sweeping_pending_;
+  }
+
   // Parallel marking support.
   void MarkInParallel();