Protect SerializedData from copying.

src/snapshot/serializer-common.h

 // Copyright 2016 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_SNAPSHOT_SERIALIZER_COMMON_H_
 #define V8_SNAPSHOT_SERIALIZER_COMMON_H_
 
 #include "src/address-map.h"
 #include "src/external-reference-table.h"
 #include "src/globals.h"
@@ skipping 221 matching lines @@
 
     void mark_as_last() { reservation_ |= IsLastChunkBits::encode(true); }
 
    private:
     uint32_t reservation_;
   };
 
   SerializedData(byte* data, int size)
       : data_(data), size_(size), owns_data_(false) {}
   SerializedData() : data_(NULL), size_(0), owns_data_(false) {}
+  SerializedData(SerializedData&& other)
+      : data_(other.data_), size_(other.size_), owns_data_(other.owns_data_) {
+    // Ensure |other| will not attempt to destroy our data in destructor.
+    other.owns_data_ = false;
+  }
 
   ~SerializedData() {
     if (owns_data_) DeleteArray<byte>(data_);
   }
 
   uint32_t GetMagicNumber() const { return GetHeaderValue(kMagicNumberOffset); }
   uint32_t GetExtraReferences() const {
     return GetHeaderValue(kExtraExternalReferencesOffset);
   }
 
@@ skipping 36 matching lines @@
   }
 
   void SetMagicNumber(Isolate* isolate) {
     SetHeaderValue(kMagicNumberOffset, ComputeMagicNumber(isolate));
     SetHeaderValue(kExtraExternalReferencesOffset, GetExtraReferences(isolate));
   }
 
   byte* data_;
   int size_;
   bool owns_data_;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(SerializedData);
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_SNAPSHOT_SERIALIZER_COMMON_H_