Implement handlified String::Flatten.

src/parser.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 841 matching lines @@
   fni_ = new(zone()) FuncNameInferrer(isolate(), zone());
 
   // Initialize parser state.
   CompleteParserRecorder recorder;
   if (cached_data_mode_ == PRODUCE_CACHED_DATA) {
     log_ = &recorder;
   } else if (cached_data_mode_ == CONSUME_CACHED_DATA) {
     (*cached_data_)->Initialize();
   }
 
-  source->TryFlatten();
+  source = String::Flatten(source);
   FunctionLiteral* result;
   if (source->IsExternalTwoByteString()) {
     // Notice that the stream is destroyed at the end of the branch block.
     // The last line of the blocks can't be moved outside, even though they're
     // identical calls.
     ExternalTwoByteStringUtf16CharacterStream stream(
         Handle<ExternalTwoByteString>::cast(source), 0, source->length());
     scanner_.Initialize(&stream);
     result = DoParseProgram(info(), source);
   } else {
@@ skipping 118 matching lines @@
   HistogramTimerScope timer_scope(isolate()->counters()->parse_lazy());
   Handle<String> source(String::cast(script_->source()));
   isolate()->counters()->total_parse_size()->Increment(source->length());
   ElapsedTimer timer;
   if (FLAG_trace_parse) {
     timer.Start();
   }
   Handle<SharedFunctionInfo> shared_info = info()->shared_info();
 
   // Initialize parser state.
-  source->TryFlatten();
+  source = String::Flatten(source);
   FunctionLiteral* result;
   if (source->IsExternalTwoByteString()) {
     ExternalTwoByteStringUtf16CharacterStream stream(
         Handle<ExternalTwoByteString>::cast(source),
         shared_info->start_position(),
         shared_info->end_position());
     result = ParseLazy(&stream);
   } else {
     GenericStringUtf16CharacterStream stream(source,
                                              shared_info->start_position(),
@@ skipping 3666 matching lines @@
       ASSERT(info()->isolate()->has_pending_exception());
     } else {
       result = ParseProgram();
     }
   }
   info()->SetFunction(result);
   return (result != NULL);
 }
 
 } }  // namespace v8::internal