Remove FLAG_cache_optimized_code because we always have it on.

src/factory.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 "src/factory.h"
 
 #include "src/allocation-site-scopes.h"
 #include "src/base/bits.h"
 #include "src/bootstrapper.h"
 #include "src/conversions.h"
@@ skipping 1328 matching lines @@
 
   if (cached.literals != nullptr) {
     result->set_literals(cached.literals);
 
   } else if (!info->bound()) {
     int number_of_literals = info->num_literals();
     Handle<LiteralsArray> literals =
         LiteralsArray::New(isolate(), handle(info->feedback_vector()),
                            number_of_literals, pretenure);
     result->set_literals(*literals);
+
     // Cache context-specific literals.
-    if (FLAG_cache_optimized_code) {
-      Handle<Context> native_context(context->native_context());
-      SharedFunctionInfo::AddToOptimizedCodeMap(
-          info, native_context, undefined_value(), literals, BailoutId::None());
-    }
+    Handle<Context> native_context(context->native_context());
+    SharedFunctionInfo::AddToOptimizedCodeMap(
+        info, native_context, undefined_value(), literals, BailoutId::None());
   }
 
   return result;
 }
 
 
 Handle<ScopeInfo> Factory::NewScopeInfo(int length) {
   Handle<FixedArray> array = NewFixedArray(length, TENURED);
   array->set_map_no_write_barrier(*scope_info_map());
   Handle<ScopeInfo> scope_info = Handle<ScopeInfo>::cast(array);
@@ skipping 1020 matching lines @@
 }
 
 
 Handle<Object> Factory::ToBoolean(bool value) {
   return value ? true_value() : false_value();
 }
 
 
 }  // namespace internal
 }  // namespace v8