Fixed various simulator-related space leaks.

src/ppc/simulator-ppc.h

Index: src/ppc/simulator-ppc.h
diff --git a/src/ppc/simulator-ppc.h b/src/ppc/simulator-ppc.h
index cf338ccfdcb8e2a252162cc6ef4874894f87c0e9..b74548fcf5b6286fabbc6fd57d42150becb2722f 100644
--- a/src/ppc/simulator-ppc.h
+++ b/src/ppc/simulator-ppc.h
@@ -212,6 +212,8 @@ class Simulator {
   // Call on program start.
   static void Initialize(Isolate* isolate);
 
+  static void TearDown(HashMap* i_cache, Redirection* first);
+
   // V8 generally calls into generated JS code with 5 parameters and into
   // generated RegExp code with 7 parameters. This is a convenience function,
   // which sets up the simulator state and grabs the result on return.