Serializer: use opcode to signal new chunk.

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 359 matching lines @@
   }
   static const int kRootArrayConstants = 0xa0;
   // 0xa0-0xbf            Things from the first 32 elements of the root array.
   static const int kRootArrayNumberOfConstantEncodings = 0x20;
   static int RootArrayConstantFromByteCode(int byte_code) {
     return byte_code & 0x1f;
   }
 
   static const int kNop = 0xf;  // Do nothing, used for padding.
 
+  static const int kNextChunk = 0x4f;  // Move to next reserved chunk.
+
   static const int kAnyOldSpace = -1;
 
   // A bitmask for getting the space out of an instruction.
   static const int kSpaceMask = 7;
   STATIC_ASSERT(kNumberOfSpaces <= kSpaceMask + 1);
 
   // Sentinel after a new object to indicate that double alignment is needed.
   static const int kDoubleAlignmentSentinel = 0;
 };
 
@@ skipping 476 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_