Support large objects in the serializer/deserializer.

src/snapshot-source-sink.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_SNAPSHOT_SOURCE_SINK_H_
 #define V8_SNAPSHOT_SOURCE_SINK_H_
 
 #include "src/base/logging.h"
 #include "src/utils.h"
 
@@ skipping 21 matching lines @@
   int32_t GetUnalignedInt();
 
   void Advance(int by) { position_ += by; }
 
   void CopyRaw(byte* to, int number_of_bytes);
 
   inline int GetInt() {
     // This way of variable-length encoding integers does not suffer from branch
     // mispredictions.
     uint32_t answer = GetUnalignedInt();
-    int bytes = answer & 3;
+    int bytes = (answer & 3) + 1;
     Advance(bytes);
     uint32_t mask = 0xffffffffu;
     mask >>= 32 - (bytes << 3);
     answer &= mask;
     answer >>= 2;
     return answer;
   }
 
   bool GetBlob(const byte** data, int* number_of_bytes);
 
@@ skipping 63 matching lines @@
   virtual int Position() OVERRIDE { return data_->length(); }
 
  private:
   i::List<byte>* data_;
 };
 
 }  // namespace v8::internal
 }  // namespace v8
 
 #endif  // V8_SNAPSHOT_SOURCE_SINK_H_