Avoid bool to Oddball conversions by being lazy.

src/isolate.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 736 matching lines @@
       if (options & StackTrace::kScriptNameOrSourceURL) {
         Handle<Object> result = GetScriptNameOrSourceURL(script);
         CHECK_NOT_EMPTY_HANDLE(this,
                                JSObject::SetLocalPropertyIgnoreAttributes(
                                    stack_frame, script_name_or_source_url_key,
                                    result, NONE));
       }
 
       if (options & StackTrace::kFunctionName) {
         Handle<Object> fun_name(fun->shared()->name(), this);
-        if (fun_name->ToBoolean()->IsFalse()) {
+        if (!fun_name->BooleanValue()) {
           fun_name = Handle<Object>(fun->shared()->inferred_name(), this);
         }
         CHECK_NOT_EMPTY_HANDLE(this,
                                JSObject::SetLocalPropertyIgnoreAttributes(
                                    stack_frame, function_key, fun_name, NONE));
       }
 
       if (options & StackTrace::kIsEval) {
         int type = Smi::cast(script->compilation_type())->value();
         Handle<Object> is_eval = (type == Script::COMPILATION_TYPE_EVAL) ?
@@ skipping 1572 matching lines @@
 
 #ifdef DEBUG
 #define ISOLATE_FIELD_OFFSET(type, name, ignored)                       \
 const intptr_t Isolate::name##_debug_offset_ = OFFSET_OF(Isolate, name##_);
 ISOLATE_INIT_LIST(ISOLATE_FIELD_OFFSET)
 ISOLATE_INIT_ARRAY_LIST(ISOLATE_FIELD_OFFSET)
 #undef ISOLATE_FIELD_OFFSET
 #endif
 
 } }  // namespace v8::internal