Revert of Encode interpreter::SourcePositionTable as variable-length ints.

src/heap/heap.cc

 // 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.
 
 #include "src/heap/heap.h"
 
 #include "src/accessors.h"
 #include "src/api.h"
 #include "src/ast/scopeinfo.h"
 #include "src/base/bits.h"
@@ skipping 3013 matching lines @@
     if (!allocation.To(&result)) return allocation;
   }
 
   result->set_map_no_write_barrier(bytecode_array_map());
   BytecodeArray* instance = BytecodeArray::cast(result);
   instance->set_length(length);
   instance->set_frame_size(frame_size);
   instance->set_parameter_count(parameter_count);
   instance->set_constant_pool(constant_pool);
   instance->set_handler_table(empty_fixed_array());
-  instance->set_source_position_table(empty_byte_array());
+  instance->set_source_position_table(empty_fixed_array());
   CopyBytes(instance->GetFirstBytecodeAddress(), raw_bytecodes, length);
 
   return result;
 }
 
 
 void Heap::CreateFillerObjectAt(Address addr, int size) {
   if (size == 0) return;
   HeapObject* filler = HeapObject::FromAddress(addr);
   if (size == kPointerSize) {
@@ skipping 3188 matching lines @@
 }
 
 
 // static
 int Heap::GetStaticVisitorIdForMap(Map* map) {
   return StaticVisitorBase::GetVisitorId(map);
 }
 
 }  // namespace internal
 }  // namespace v8