Reland: [Parse] ParseInfo owns the parsing Zone.

src/compiler.cc

Index: src/compiler.cc
diff --git a/src/compiler.cc b/src/compiler.cc
index 0ed44b143576db31eaf0e53fc9e07d24b3ddc6d2..39dd9fbef915cd8fc9d866af39003a9b0cab135f 100644
--- a/src/compiler.cc
+++ b/src/compiler.cc
@@ -537,8 +537,7 @@ bool CompileUnoptimizedInnerFunctions(
       continue;
     } else {
       // Otherwise generate unoptimized code now.
-      Zone zone(isolate->allocator(), ZONE_NAME);
-      ParseInfo parse_info(&zone, script);
+      ParseInfo parse_info(script);
       CompilationInfo info(&parse_info, Handle<JSFunction>::null());
 
       parse_info.set_literal(literal);
@@ -925,8 +924,7 @@ MaybeHandle<Code> GetBaselineCode(Handle<JSFunction> function) {
   Isolate* isolate = function->GetIsolate();
   VMState<COMPILER> state(isolate);
   PostponeInterruptsScope postpone(isolate);
-  Zone zone(isolate->allocator(), ZONE_NAME);
-  ParseInfo parse_info(&zone, handle(function->shared()));
+  ParseInfo parse_info(handle(function->shared()));
   CompilationInfo info(&parse_info, function);
 
   DCHECK(function->shared()->is_compiled());
@@ -1059,8 +1057,7 @@ MaybeHandle<Code> GetLazyCode(Handle<JSFunction> function) {
     return entry;
   }
 
-  Zone zone(isolate->allocator(), ZONE_NAME);
-  ParseInfo parse_info(&zone, handle(function->shared()));
+  ParseInfo parse_info(handle(function->shared()));
   CompilationInfo info(&parse_info, function);
   Handle<Code> result;
   ASSIGN_RETURN_ON_EXCEPTION(isolate, result, GetUnoptimizedCode(&info), Code);
@@ -1241,8 +1238,7 @@ bool Compiler::CompileOptimized(Handle<JSFunction> function,
       code = isolate->builtins()->InterpreterEntryTrampoline();
       function->shared()->ReplaceCode(*code);
     } else {
-      Zone zone(isolate->allocator(), ZONE_NAME);
-      ParseInfo parse_info(&zone, handle(function->shared()));
+      ParseInfo parse_info(handle(function->shared()));
       CompilationInfo info(&parse_info, function);
       if (!GetUnoptimizedCode(&info).ToHandle(&code)) {
         return false;
@@ -1266,8 +1262,7 @@ bool Compiler::CompileDebugCode(Handle<SharedFunctionInfo> shared) {
   DCHECK(AllowCompilation::IsAllowed(isolate));
 
   // Start a compilation.
-  Zone zone(isolate->allocator(), ZONE_NAME);
-  ParseInfo parse_info(&zone, shared);
+  ParseInfo parse_info(shared);
   CompilationInfo info(&parse_info, Handle<JSFunction>::null());
   info.MarkAsDebug();
   if (GetUnoptimizedCode(&info).is_null()) {
@@ -1294,8 +1289,7 @@ MaybeHandle<JSArray> Compiler::CompileForLiveEdit(Handle<Script> script) {
   script->set_shared_function_infos(isolate->heap()->empty_fixed_array());
 
   // Start a compilation.
-  Zone zone(isolate->allocator(), ZONE_NAME);
-  ParseInfo parse_info(&zone, script);
+  ParseInfo parse_info(script);
   CompilationInfo info(&parse_info, Handle<JSFunction>::null());
   info.MarkAsDebug();
 
@@ -1306,7 +1300,7 @@ MaybeHandle<JSArray> Compiler::CompileForLiveEdit(Handle<Script> script) {
     // Check postconditions on success.
     DCHECK(!isolate->has_pending_exception());
     infos = LiveEditFunctionTracker::Collect(parse_info.literal(), script,
-                                             &zone, isolate);
+                                             parse_info.zone(), isolate);
   }
 
   // Restore the original function info list in order to remain side-effect
@@ -1436,8 +1430,7 @@ MaybeHandle<JSFunction> Compiler::GetFunctionFromEval(
     script->set_compilation_type(Script::COMPILATION_TYPE_EVAL);
     Script::SetEvalOrigin(script, outer_info, eval_position);
 
-    Zone zone(isolate->allocator(), ZONE_NAME);
-    ParseInfo parse_info(&zone, script);
+    ParseInfo parse_info(script);
     CompilationInfo info(&parse_info, Handle<JSFunction>::null());
     parse_info.set_eval();
     parse_info.set_language_mode(language_mode);
@@ -1646,8 +1639,7 @@ Handle<SharedFunctionInfo> Compiler::GetSharedFunctionInfoForScript(
     }
 
     // Compile the function and add it to the cache.
-    Zone zone(isolate->allocator(), ZONE_NAME);
-    ParseInfo parse_info(&zone, script);
+    ParseInfo parse_info(script);
     CompilationInfo info(&parse_info, Handle<JSFunction>::null());
     if (resource_options.IsModule()) parse_info.set_module();
     if (compile_options != ScriptCompiler::kNoCompileOptions) {