Reland: [Parse] ParseInfo owns the parsing Zone.

test/cctest/compiler/function-tester.cc

 // Copyright 2014 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 "test/cctest/compiler/function-tester.h"
 
 #include "src/ast/ast-numbering.h"
 #include "src/compilation-info.h"
 #include "src/compiler.h"
 #include "src/compiler/linkage.h"
@@ skipping 137 matching lines @@
                                                    int param_count) {
   JSFunction* p = NULL;
   {  // because of the implicit handle scope of FunctionTester.
     FunctionTester f(graph, param_count);
     p = *f.function;
   }
   return Handle<JSFunction>(p);  // allocated in outer handle scope.
 }
 
 Handle<JSFunction> FunctionTester::Compile(Handle<JSFunction> function) {
-  Zone zone(function->GetIsolate()->allocator(), ZONE_NAME);
-  ParseInfo parse_info(&zone, handle(function->shared()));
+  ParseInfo parse_info(handle(function->shared()));
   CompilationInfo info(&parse_info, function);
 
   info.SetOptimizing();
   info.MarkAsDeoptimizationEnabled();
   if (flags_ & CompilationInfo::kInliningEnabled) {
     info.MarkAsInliningEnabled();
   }
 
   CHECK(Compiler::Compile(function, Compiler::CLEAR_EXCEPTION));
   if (info.shared_info()->HasBytecodeArray()) {
     info.MarkAsOptimizeFromBytecode();
   } else {
     CHECK(Compiler::ParseAndAnalyze(info.parse_info()));
     CHECK(Compiler::EnsureDeoptimizationSupport(&info));
   }
   JSFunction::EnsureLiterals(function);
 
   Handle<Code> code = Pipeline::GenerateCodeForTesting(&info);
   CHECK(!code.is_null());
   info.dependencies()->Commit(code);
   info.context()->native_context()->AddOptimizedCode(*code);
   function->ReplaceCode(*code);
   return function;
 }
 
 // Compile the given machine graph instead of the source of the function
 // and replace the JSFunction's code with the result.
 Handle<JSFunction> FunctionTester::CompileGraph(Graph* graph) {
-  Zone zone(function->GetIsolate()->allocator(), ZONE_NAME);
-  ParseInfo parse_info(&zone, handle(function->shared()));
+  ParseInfo parse_info(handle(function->shared()));
   CompilationInfo info(&parse_info, function);
 
   CHECK(parsing::ParseFunction(info.parse_info()));
   info.SetOptimizing();
 
   Handle<Code> code = Pipeline::GenerateCodeForTesting(&info, graph);
   CHECK(!code.is_null());
   function->ReplaceCode(*code);
   return function;
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8