Protect SerializedData from copying.

src/snapshot/code-serializer.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_CODE_SERIALIZER_H_
 #define V8_SNAPSHOT_CODE_SERIALIZER_H_
 
 #include "src/parsing/preparse-data.h"
 #include "src/snapshot/serializer.h"
 
@@ skipping 98 matching lines @@
   static const int kFlagHashOffset = kCpuFeaturesOffset + kInt32Size;
   static const int kNumReservationsOffset = kFlagHashOffset + kInt32Size;
   static const int kNumCodeStubKeysOffset = kNumReservationsOffset + kInt32Size;
   static const int kPayloadLengthOffset = kNumCodeStubKeysOffset + kInt32Size;
   static const int kChecksum1Offset = kPayloadLengthOffset + kInt32Size;
   static const int kChecksum2Offset = kChecksum1Offset + kInt32Size;
   static const int kUnalignedHeaderSize = kChecksum2Offset + kInt32Size;
   static const int kHeaderSize = POINTER_SIZE_ALIGN(kUnalignedHeaderSize);
 
   // Used when consuming.
-  static const SerializedCodeData FromCachedData(
-      Isolate* isolate, ScriptData* cached_data, uint32_t expected_source_hash,
-      SanityCheckResult* rejection_result);
+  static SerializedCodeData FromCachedData(Isolate* isolate,
+                                           ScriptData* cached_data,
+                                           uint32_t expected_source_hash,
+                                           SanityCheckResult* rejection_result);
 
   // Used when producing.
   SerializedCodeData(const List<byte>* payload, const CodeSerializer* cs);
 
   // Return ScriptData object and relinquish ownership over it to the caller.
   ScriptData* GetScriptData();
 
   Vector<const Reservation> Reservations() const;
   Vector<const byte> Payload() const;
 
@@ skipping 11 matching lines @@
   }
 
   SanityCheckResult SanityCheck(Isolate* isolate,
                                 uint32_t expected_source_hash) const;
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_SNAPSHOT_CODE_SERIALIZER_H_