Handlify all context allocators from the Heap.

src/factory.h

 // 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.
 
 #ifndef V8_FACTORY_H_
 #define V8_FACTORY_H_
 
 #include "isolate.h"
 
 namespace v8 {
@@ skipping 184 matching lines @@
 
   // Create a catch context.
   Handle<Context> NewCatchContext(Handle<JSFunction> function,
                                   Handle<Context> previous,
                                   Handle<String> name,
                                   Handle<Object> thrown_object);
 
   // Create a 'with' context.
   Handle<Context> NewWithContext(Handle<JSFunction> function,
                                  Handle<Context> previous,
-                                 Handle<JSObject> extension);
+                                 Handle<JSReceiver> extension);
 
   // Create a block context.
   Handle<Context> NewBlockContext(Handle<JSFunction> function,
                                   Handle<Context> previous,
                                   Handle<ScopeInfo> scope_info);
 
   // Allocate a new struct.  The struct is pretenured (allocated directly in
   // the old generation).
   Handle<Struct> NewStruct(InstanceType type);
 
@@ skipping 397 matching lines @@
 
   // Update the map cache in the native context with (keys, map)
   Handle<MapCache> AddToMapCache(Handle<Context> context,
                                  Handle<FixedArray> keys,
                                  Handle<Map> map);
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_FACTORY_H_