Encode interpreter::SourcePositionTable as variable-length ints.

src/objects.h

 // Copyright 2015 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_OBJECTS_H_
 #define V8_OBJECTS_H_
 
 #include <iosfwd>
 
 #include "src/assert-scope.h"
@@ skipping 4444 matching lines @@
   inline void set_interrupt_budget(int interrupt_budget);
 
   // Accessors for the constant pool.
   DECL_ACCESSORS(constant_pool, FixedArray)
 
   // Accessors for handler table containing offsets of exception handlers.
   DECL_ACCESSORS(handler_table, FixedArray)
 
   // Accessors for source position table containing mappings between byte code
   // offset and source position.
-  DECL_ACCESSORS(source_position_table, FixedArray)
+  DECL_ACCESSORS(source_position_table, ByteArray)
 
   DECLARE_CAST(BytecodeArray)
 
   // Dispatched behavior.
   inline int BytecodeArraySize();
 
   inline int instruction_size();
 
   int SourcePosition(int offset);
   int SourceStatementPosition(int offset);
@@ skipping 6358 matching lines @@
     }
     return value;
   }
 };
 
 
 }  // NOLINT, false-positive due to second-order macros.
 }  // NOLINT, false-positive due to second-order macros.
 
 #endif  // V8_OBJECTS_H_