Split parsing of functions and top-level code into two separate methods

test/fuzzer/parser.cc

 // Copyright 2016 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 <limits.h>
 #include <stddef.h>
 #include <stdint.h>
 
 #include "include/v8.h"
 #include "src/objects.h"
 #include "src/parsing/parse-info.h"
-#include "src/parsing/parser.h"
+#include "src/parsing/parsing.h"
 #include "src/parsing/preparser.h"
 #include "test/fuzzer/fuzzer-support.h"
 
 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
   v8_fuzzer::FuzzerSupport* support = v8_fuzzer::FuzzerSupport::Get();
   v8::Isolate* isolate = support->GetIsolate();
 
   v8::Isolate::Scope isolate_scope(isolate);
   v8::HandleScope handle_scope(isolate);
   v8::Context::Scope context_scope(support->GetContext());
   v8::TryCatch try_catch(isolate);
 
   v8::internal::Isolate* i_isolate =
       reinterpret_cast<v8::internal::Isolate*>(isolate);
   v8::internal::Factory* factory = i_isolate->factory();
 
   if (size > INT_MAX) return 0;
   v8::internal::MaybeHandle<v8::internal::String> source =
       factory->NewStringFromOneByte(
           v8::internal::Vector<const uint8_t>(data, static_cast<int>(size)));
   if (source.is_null()) return 0;
 
   v8::internal::Handle<v8::internal::Script> script =
       factory->NewScript(source.ToHandleChecked());
   v8::internal::Zone zone(i_isolate->allocator(), ZONE_NAME);
   v8::internal::ParseInfo info(&zone, script);
-  v8::internal::Parser parser(&info);
-  parser.Parse(&info);
+  v8::internal::parsing::ParseProgram(&info);
   isolate->RequestGarbageCollectionForTesting(
       v8::Isolate::kFullGarbageCollection);
   return 0;
 }