Don't pre-initialise block contexts with holes

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 813 matching lines @@
   context->set_previous(*previous);
   context->set_extension(*extension);
   context->set_native_context(previous->native_context());
   return context;
 }
 
 
 Handle<Context> Factory::NewBlockContext(Handle<JSFunction> function,
                                          Handle<Context> previous,
                                          Handle<ScopeInfo> scope_info) {
-  Handle<FixedArray> array =
-      NewFixedArrayWithHoles(scope_info->ContextLength());
+  Handle<FixedArray> array = NewFixedArray(scope_info->ContextLength());
   array->set_map_no_write_barrier(*block_context_map());
   Handle<Context> context = Handle<Context>::cast(array);
   context->set_closure(*function);
   context->set_previous(*previous);
   context->set_extension(*scope_info);
   context->set_native_context(previous->native_context());
   return context;
 }
 
 
@@ skipping 1553 matching lines @@
 }
 
 
 Handle<Object> Factory::ToBoolean(bool value) {
   return value ? true_value() : false_value();
 }
 
 
 }  // namespace internal
 }  // namespace v8