Reland: [Parse] ParseInfo owns the parsing Zone.

test/unittests/compiler-dispatcher/compiler-dispatcher-unittest.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 "src/compiler-dispatcher/compiler-dispatcher.h"
 
 #include "include/v8-platform.h"
 #include "src/base/platform/semaphore.h"
 #include "src/compiler-dispatcher/compiler-dispatcher-job.h"
 #include "src/compiler-dispatcher/compiler-dispatcher-tracer.h"
@@ skipping 797 matching lines @@
 TEST_F(CompilerDispatcherTest, EnqueueParsed) {
   MockPlatform platform;
   CompilerDispatcher dispatcher(i_isolate(), &platform, FLAG_stack_size);
 
   const char script[] =
       "function g() { var y = 1; function f17(x) { return x * y }; return f17; "
       "} g();";
   Handle<JSFunction> f = Handle<JSFunction>::cast(RunJS(isolate(), script));
   Handle<SharedFunctionInfo> shared(f->shared(), i_isolate());
 
-  Zone zone(i_isolate()->allocator(), ZONE_NAME);
-  ParseInfo parse_info(&zone, shared);
+  ParseInfo parse_info(shared);
   ASSERT_TRUE(Compiler::ParseAndAnalyze(&parse_info));
 
   ASSERT_FALSE(dispatcher.IsEnqueued(shared));
   ASSERT_TRUE(dispatcher.Enqueue(shared, parse_info.literal()));
   ASSERT_TRUE(dispatcher.IsEnqueued(shared));
 
   ASSERT_TRUE(dispatcher.jobs_.begin()->second->status() ==
               CompileJobStatus::kAnalyzed);
 
   ASSERT_TRUE(platform.IdleTaskPending());
   platform.ClearIdleTask();
   ASSERT_FALSE(platform.BackgroundTasksPending());
 }
 
 TEST_F(CompilerDispatcherTest, EnqueueAndStepParsed) {
   MockPlatform platform;
   CompilerDispatcher dispatcher(i_isolate(), &platform, FLAG_stack_size);
 
   const char script[] =
       "function g() { var y = 1; function f18(x) { return x * y }; return f18; "
       "} g();";
   Handle<JSFunction> f = Handle<JSFunction>::cast(RunJS(isolate(), script));
   Handle<SharedFunctionInfo> shared(f->shared(), i_isolate());
 
-  Zone zone(i_isolate()->allocator(), ZONE_NAME);
-  ParseInfo parse_info(&zone, shared);
+  ParseInfo parse_info(shared);
   ASSERT_TRUE(Compiler::ParseAndAnalyze(&parse_info));
 
   ASSERT_FALSE(dispatcher.IsEnqueued(shared));
   ASSERT_TRUE(dispatcher.EnqueueAndStep(shared, parse_info.literal()));
   ASSERT_TRUE(dispatcher.IsEnqueued(shared));
 
   ASSERT_TRUE(dispatcher.jobs_.begin()->second->status() ==
               CompileJobStatus::kReadyToCompile);
 
   ASSERT_TRUE(platform.IdleTaskPending());
@@ skipping 15 matching lines @@
   const char script2[] =
       "function g() { var y = 1; function f20(x) { return x * y }; return f20; "
       "} g();";
   Handle<JSFunction> f2 = Handle<JSFunction>::cast(RunJS(isolate(), script2));
   Handle<SharedFunctionInfo> shared2(f2->shared(), i_isolate());
 
   ASSERT_FALSE(shared1->is_compiled());
   ASSERT_FALSE(shared2->is_compiled());
 
   // Enqueue shared1 as already parsed.
-  Zone zone(i_isolate()->allocator(), ZONE_NAME);
-  ParseInfo parse_info(&zone, shared1);
+  ParseInfo parse_info(shared1);
   ASSERT_TRUE(Compiler::ParseAndAnalyze(&parse_info));
   ASSERT_TRUE(dispatcher.Enqueue(shared1, parse_info.literal()));
 
   // Enqueue shared2 for parsing and compiling
   ASSERT_TRUE(dispatcher.Enqueue(shared2));
 
   ASSERT_TRUE(dispatcher.FinishAllNow());
 
   // Finishing removes the SFI from the queue.
   ASSERT_FALSE(dispatcher.IsEnqueued(shared1));
   ASSERT_FALSE(dispatcher.IsEnqueued(shared2));
   ASSERT_TRUE(shared1->is_compiled());
   ASSERT_TRUE(shared2->is_compiled());
   ASSERT_TRUE(platform.IdleTaskPending());
   platform.ClearIdleTask();
 }
 
 }  // namespace internal
 }  // namespace v8