Reland: [Parse] ParseInfo owns the parsing Zone.

test/cctest/parsing/test-preparser.cc

 // Copyright 2017 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/ast/ast.h"
 #include "src/compiler.h"
 #include "src/objects-inl.h"
 #include "src/parsing/parse-info.h"
 #include "src/parsing/parsing.h"
 
@@ skipping 306 matching lines @@
     i::SNPrintF(lazy_program + prefix_len + inner_function_len + params_len +
                     source_len,
                 "%s", suffix);
 
     i::Handle<i::String> source =
         factory->InternalizeUtf8String(lazy_program.start());
     source->PrintOn(stdout);
     printf("\n");
 
     i::Handle<i::Script> script = factory->NewScript(source);
-    i::Zone zone(CcTest::i_isolate()->allocator(), ZONE_NAME);
-    i::ParseInfo lazy_info(&zone, script);
+    i::ParseInfo lazy_info(script);
 
     // No need to run scope analysis; preparser scope data is produced when
     // parsing.
     CHECK(i::parsing::ParseProgram(&lazy_info));
 
     // Then parse eagerly and check against the scope data.
     inner_function = eager_inner;
     inner_function_len = Utf8LengthHelper(inner_function) - 4;
     len =
         prefix_len + inner_function_len + params_len + source_len + suffix_len;
 
     i::ScopedVector<char> eager_program(len + 1);
     i::SNPrintF(eager_program, "%s", prefix);
     i::SNPrintF(eager_program + prefix_len, inner_function, inners[i].params,
                 inners[i].source);
     i::SNPrintF(eager_program + prefix_len + inner_function_len + params_len +
                     source_len,
                 "%s", suffix);
 
     source = factory->InternalizeUtf8String(eager_program.start());
     source->PrintOn(stdout);
     printf("\n");
 
     script = factory->NewScript(source);
-    i::ParseInfo eager_info(&zone, script);
+    i::ParseInfo eager_info(script);
     eager_info.set_allow_lazy_parsing(false);
 
     CHECK(i::parsing::ParseProgram(&eager_info));
     CHECK(i::Compiler::Analyze(&eager_info));
 
     i::Scope* scope =
         eager_info.literal()->scope()->inner_scope()->inner_scope();
     DCHECK_NOT_NULL(scope);
     DCHECK_NULL(scope->sibling());
     DCHECK(scope->is_function_scope());
 
     size_t index = 0;
     i::ScopeTestHelper::CompareScopeToData(
         scope, lazy_info.preparsed_scope_data(), index,
         inners[i].precise_maybe_assigned);
   }
 }