Reland r13188, r13194, r13256 (Deferred formatting of error stack trace during GC).

src/api.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 1844 matching lines @@
 }
 
 
 v8::Local<Value> v8::TryCatch::StackTrace() const {
   ASSERT(isolate_ == i::Isolate::Current());
   if (HasCaught()) {
     i::Object* raw_obj = reinterpret_cast<i::Object*>(exception_);
     if (!raw_obj->IsJSObject()) return v8::Local<Value>();
     i::HandleScope scope(isolate_);
     i::Handle<i::JSObject> obj(i::JSObject::cast(raw_obj), isolate_);
-    i::Handle<i::String> name =
-        isolate_->factory()->LookupOneByteSymbol(STATIC_ASCII_VECTOR("stack"));
+    i::Handle<i::String> name = isolate_->factory()->stack_symbol();
     if (!obj->HasProperty(*name)) return v8::Local<Value>();
     i::Handle<i::Object> value = i::GetProperty(obj, name);
     if (value.is_null()) return v8::Local<Value>();
     return v8::Utils::ToLocal(scope.CloseAndEscape(value));
   } else {
     return v8::Local<Value>();
   }
 }
 
 
@@ skipping 4870 matching lines @@
 
   v->VisitPointers(blocks_.first(), first_block_limit_);
 
   for (int i = 1; i < blocks_.length(); i++) {
     v->VisitPointers(blocks_[i], &blocks_[i][kHandleBlockSize]);
   }
 }
 
 
 } }  // namespace v8::internal