Use a custom Struct for stack trace storage

src/factory.cc

 // Copyright 2014 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/factory.h"
 
 #include "src/accessors.h"
 #include "src/allocation-site-scopes.h"
 #include "src/base/bits.h"
 #include "src/bootstrapper.h"
@@ skipping 899 matching lines @@
   script->set_line_ends(heap->undefined_value());
   script->set_eval_from_shared(heap->undefined_value());
   script->set_eval_from_position(0);
   script->set_shared_function_infos(Smi::FromInt(0));
   script->set_flags(0);
 
   heap->set_script_list(*WeakFixedArray::Add(script_list(), script));
   return script;
 }
 
+Handle<StackTraceFrame> Factory::NewStackTraceFrame() {
+  Handle<StackTraceFrame> frame =
+      Handle<StackTraceFrame>::cast(NewStruct(STACK_TRACE_FRAME_TYPE));
+  frame->set_flags(0);
+  frame->set_offset(0);
+  return frame;
+}
 
 Handle<Foreign> Factory::NewForeign(Address addr, PretenureFlag pretenure) {
   CALL_HEAP_FUNCTION(isolate(),
                      isolate()->heap()->AllocateForeign(addr, pretenure),
                      Foreign);
 }
 
 
 Handle<Foreign> Factory::NewForeign(const AccessorDescriptor* desc) {
   return NewForeign((Address) desc, TENURED);
@@ skipping 1561 matching lines @@
     Handle<AccessorInfo> prototype =
         Accessors::FunctionPrototypeInfo(isolate(), attribs);
     AccessorConstantDescriptor d(Handle<Name>(Name::cast(prototype->name())),
                                  prototype, attribs);
     map->AppendDescriptor(&d);
   }
 }
 
 }  // namespace internal
 }  // namespace v8