Fix memory leak in RootIndexMap.

src/serialize.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_SERIALIZE_H_
 #define V8_SERIALIZE_H_
 
 #include "src/compiler.h"
 #include "src/hashmap.h"
 #include "src/heap-profiler.h"
@@ skipping 151 matching lines @@
   static void* Key(HeapObject* obj) {
     return reinterpret_cast<void*>(obj->address());
   }
 };
 
 
 class RootIndexMap : public AddressMapBase {
  public:
   explicit RootIndexMap(Isolate* isolate);
 
+  ~RootIndexMap() { delete map_; }
+
   static const int kInvalidRootIndex = -1;
   int Lookup(HeapObject* obj) {
     HashMap::Entry* entry = LookupEntry(map_, obj, false);
     if (entry) return GetValue(entry);
     return kInvalidRootIndex;
   }
 
  private:
   HashMap* map_;
 
@@ skipping 645 matching lines @@
   // Following the header, we store, in sequential order
   // - code stub keys
   // - serialization payload
 
   ScriptData* script_data_;
   bool owns_script_data_;
 };
 } }  // namespace v8::internal
 
 #endif  // V8_SERIALIZE_H_