[turbofan] Disable inline allocation of closures.

test/unittests/compiler/js-create-lowering-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/js-create-lowering.h"
 #include "src/code-factory.h"
 #include "src/compilation-dependencies.h"
 #include "src/compiler/access-builder.h"
 #include "src/compiler/js-graph.h"
 #include "src/compiler/js-operator.h"
@@ skipping 122 matching lines @@
   ASSERT_TRUE(r.Changed());
   EXPECT_THAT(
       r.replacement(),
       IsFinishRegion(IsAllocate(IsNumberConstant(JSArray::kSize), _, _), _));
 }
 
 // -----------------------------------------------------------------------------
 // JSCreateClosure
 
 TEST_F(JSCreateLoweringTest, JSCreateClosureViaInlinedAllocation) {
+  if (!FLAG_turbo_lower_create_closure) return;
   Node* const context = UndefinedConstant();
   Node* const effect = graph()->start();
   Node* const control = graph()->start();
   Handle<SharedFunctionInfo> shared(isolate()->number_function()->shared());
 
   // Create a mock feedback vector. It just has to be an array with an array
   // in slot 0.
   Handle<FixedArray> array = isolate()->factory()->NewFixedArray(
       TypeFeedbackVector::kReservedIndexCount + 1);
   array->set_map_no_write_barrier(
@@ skipping 71 matching lines @@
   EXPECT_THAT(r.replacement(),
               IsFinishRegion(IsAllocate(IsNumberConstant(Context::SizeFor(
                                             Context::MIN_CONTEXT_SLOTS + 1)),
                                         IsBeginRegion(_), control),
                              _));
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8