Removed the delete calls to ZoneObjects.

src/ia32/jump-target-ia32.cc

Index: src/ia32/jump-target-ia32.cc
===================================================================
--- src/ia32/jump-target-ia32.cc	(revision 1947)
+++ src/ia32/jump-target-ia32.cc	(working copy)
@@ -305,7 +305,6 @@
             if (other != NULL && other->Equals(cgen_->frame())) {
               // Set the reaching frame element to null to avoid
               // processing it later, and then bind its entry label.
-              delete other;
               reaching_frames_[j] = NULL;
               __ bind(&merge_labels_[j]);
             }
@@ -342,7 +341,6 @@
     // them.
     for (int i = 0; i < reaching_frames_.length(); i++) {
       if (!merge_labels_[i].is_bound()) {
-        delete reaching_frames_[i];
         reaching_frames_[i] = NULL;
         __ bind(&merge_labels_[i]);
       }