[Parser] Don't internalize on-the-fly.

src/parsing/parser.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/parsing/parser.h"
 
 #include <memory>
 
 #include "src/api.h"
 #include "src/ast/ast-expression-rewriter.h"
@@ skipping 4368 matching lines @@
     script->set_source_url(*source_url);
   }
   Handle<String> source_mapping_url = scanner_.SourceMappingUrl(isolate);
   if (!source_mapping_url.is_null()) {
     script->set_source_mapping_url(*source_mapping_url);
   }
 }
 
 
 void Parser::Internalize(Isolate* isolate, Handle<Script> script, bool error) {
-  // Internalize strings.
+  // Internalize strings and values.
   ast_value_factory()->Internalize(isolate);
 
   // Error processing.
   if (error) {
     if (stack_overflow()) {
       isolate->StackOverflow();
     } else {
       DCHECK(pending_error_handler_.has_pending_error());
       pending_error_handler_.ThrowPendingError(isolate, script);
     }
@@ skipping 46 matching lines @@
     } else {
       result = ParseProgram(isolate, info);
     }
   } else {
     SetCachedData(info);
     result = ParseProgram(isolate, info);
   }
   info->set_literal(result);
 
   Internalize(isolate, info->script(), result == NULL);
-  DCHECK(ast_value_factory()->IsInternalized());
   return (result != NULL);
 }
 
 
 void Parser::ParseOnBackground(ParseInfo* info) {
   parsing_on_main_thread_ = false;
 
   DCHECK(info->literal() == NULL);
   FunctionLiteral* result = NULL;
 
@@ skipping 1521 matching lines @@
     Block* try_block = factory()->NewBlock(nullptr, 1, false, nopos);
     try_block->statements()->Add(loop, zone());
 
     FinalizeIteratorUse(var_completion, closing_condition, loop->iterator(),
                         try_block, final_loop);
   }
 
   return final_loop;
 }
 
-#ifdef DEBUG
-void Parser::Print(AstNode* node) {
-  ast_value_factory()->Internalize(Isolate::Current());
-  node->Print(Isolate::Current());
-}
-#endif  // DEBUG
-
 #undef CHECK_OK
 #undef CHECK_OK_VOID
 #undef CHECK_FAILED
 
 }  // namespace internal
 }  // namespace v8