[parser] Remove ParseInfo::closure field.

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 "src/api.h"
 #include "src/ast/ast.h"
 #include "src/ast/ast-expression-rewriter.h"
 #include "src/ast/ast-expression-visitor.h"
@@ skipping 21 matching lines @@
     : owns_data_(false), rejected_(false), data_(data), length_(length) {
   if (!IsAligned(reinterpret_cast<intptr_t>(data), kPointerAlignment)) {
     byte* copy = NewArray<byte>(length);
     DCHECK(IsAligned(reinterpret_cast<intptr_t>(copy), kPointerAlignment));
     CopyBytes(copy, data, length);
     data_ = copy;
     AcquireDataOwnership();
   }
 }
 
-
 ParseInfo::ParseInfo(Zone* zone)
     : zone_(zone),
       flags_(0),
       source_stream_(nullptr),
       source_stream_encoding_(ScriptCompiler::StreamedSource::ONE_BYTE),
       extension_(nullptr),
       compile_options_(ScriptCompiler::kNoCompileOptions),
       script_scope_(nullptr),
       unicode_cache_(nullptr),
       stack_limit_(0),
       hash_seed_(0),
+      isolate_(nullptr),
       cached_data_(nullptr),
       ast_value_factory_(nullptr),
       literal_(nullptr),
       scope_(nullptr) {}
 
-
 ParseInfo::ParseInfo(Zone* zone, Handle<JSFunction> function)
     : ParseInfo(zone, Handle<SharedFunctionInfo>(function->shared())) {
-  set_closure(function);
   set_context(Handle<Context>(function->context()));
 }
 
 
 ParseInfo::ParseInfo(Zone* zone, Handle<SharedFunctionInfo> shared)
     : ParseInfo(zone) {
   isolate_ = shared->GetIsolate();
 
   set_lazy();
   set_hash_seed(isolate_->heap()->HashSeed());
@@ skipping 971 matching lines @@
 
   ParsingModeScope parsing_mode(this, PARSE_EAGERLY);
 
   // Place holder for the result.
   FunctionLiteral* result = NULL;
 
   {
     // Parse the function literal.
     Scope* scope = NewScope(scope_, SCRIPT_SCOPE);
     info->set_script_scope(scope);
-    if (!info->closure().is_null()) {
+    if (!info->context().is_null()) {
       // Ok to use Isolate here, since lazy function parsing is only done in the
       // main thread.
       DCHECK(parsing_on_main_thread_);
-      scope = Scope::DeserializeScopeChain(isolate, zone(),
-                                           info->closure()->context(), scope);
+      scope = Scope::DeserializeScopeChain(isolate, zone(), *info->context(),
+                                           scope);
     }
     original_scope_ = scope;
     AstNodeFactory function_factory(ast_value_factory());
     FunctionState function_state(&function_state_, &scope_, scope,
                                  shared_info->kind(), &function_factory);
     DCHECK(is_sloppy(scope->language_mode()) ||
            is_strict(info->language_mode()));
     DCHECK(info->language_mode() == shared_info->language_mode());
     FunctionLiteral::FunctionType function_type =
         ComputeFunctionType(shared_info);
@@ skipping 5799 matching lines @@
                         try_block, target);
     final_loop = target;
   }
 
   return final_loop;
 }
 
 
 }  // namespace internal
 }  // namespace v8