Fixed various simulator-related space leaks.

src/arm64/simulator-arm64.cc

Index: src/arm64/simulator-arm64.cc
diff --git a/src/arm64/simulator-arm64.cc b/src/arm64/simulator-arm64.cc
index 54ad4b08b29c65bb4c7a5d59c077bfd2a68f875d..0b1ba1d46b63120f1be3d388b14810db81ac9e2d 100644
--- a/src/arm64/simulator-arm64.cc
+++ b/src/arm64/simulator-arm64.cc
@@ -500,6 +500,14 @@ class Redirection {
     return redirection->external_function<void*>();
   }
 
+  static void DeleteChain(Redirection* redirection) {
+    while (redirection != nullptr) {
+      Redirection* next = redirection->next_;
+      delete redirection;
+      redirection = next;
+    }
+  }
+
  private:
   void* external_function_;
   Instruction redirect_call_;
@@ -508,6 +516,12 @@ class Redirection {
 };
 
 
+// static
+void Simulator::TearDown(HashMap* i_cache, Redirection* first) {
+  Redirection::DeleteChain(first);
+}
+
+
 // Calls into the V8 runtime are based on this very simple interface.
 // Note: To be able to return two values from some calls the code in runtime.cc
 // uses the ObjectPair structure.