[runtime] No need to carry around the creation context for JSBoundFunctions.

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 1983 matching lines @@
     map = Map::TransitionToPrototype(map, prototype, REGULAR_PROTOTYPE);
   }
   DCHECK_EQ(target_function->IsConstructor(), map->is_constructor());
 
   // Setup the JSBoundFunction instance.
   Handle<JSBoundFunction> result =
       Handle<JSBoundFunction>::cast(NewJSObjectFromMap(map));
   result->set_bound_target_function(*target_function);
   result->set_bound_this(*bound_this);
   result->set_bound_arguments(*bound_arguments);
-  result->set_creation_context(*isolate()->native_context());
   result->set_length(Smi::FromInt(0));
   result->set_name(*undefined_value(), SKIP_WRITE_BARRIER);
   return result;
 }
 
 
 // ES6 section 9.5.15 ProxyCreate (target, handler)
 Handle<JSProxy> Factory::NewJSProxy(Handle<JSReceiver> target,
                                     Handle<JSReceiver> handler) {
   // Allocate the proxy object.
@@ skipping 383 matching lines @@
 }
 
 
 Handle<Object> Factory::ToBoolean(bool value) {
   return value ? true_value() : false_value();
 }
 
 
 }  // namespace internal
 }  // namespace v8