One Zone per CompilationInfo.

src/type-info.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 493 matching lines @@
     ASSERT(Handle<Code>::cast(object)->ic_state() == MEGAMORPHIC);
   } else if (object->IsMap()) {
     types->Add(Handle<Map>::cast(object), zone());
   } else if (FLAG_collect_megamorphic_maps_from_stub_cache &&
       Handle<Code>::cast(object)->ic_state() == MEGAMORPHIC) {
     types->Reserve(4, zone());
     ASSERT(object->IsCode());
     isolate_->stub_cache()->CollectMatchingMaps(types,
                                                 *name,
                                                 flags,
-                                                global_context_);
+                                                global_context_,
+                                                zone());
   }
 }
 
 
 // Check if a map originates from a given global context. We use this
 // information to filter out maps from different context to avoid
 // retaining objects from different tabs in Chrome via optimized code.
 bool TypeFeedbackOracle::CanRetainOtherContext(Map* map,
                                                Context* global_context) {
   Object* constructor = NULL;
@@ skipping 189 matching lines @@
   USE(maybe_result);
 #ifdef DEBUG
   Object* result = NULL;
   // Dictionary has been allocated with sufficient size for all elements.
   ASSERT(maybe_result->ToObject(&result));
   ASSERT(*dictionary_ == result);
 #endif
 }
 
 } }  // namespace v8::internal