[runtime] Replace global object link with native context link in all contexts.

src/contexts-inl.h

 // Copyright 2015 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_CONTEXTS_INL_H_
 #define V8_CONTEXTS_INL_H_
 
 #include "src/contexts.h"
 #include "src/objects-inl.h"
 
@@ skipping 47 matching lines @@
 
 bool Context::has_extension() { return extension() != nullptr; }
 Object* Context::extension() { return get(EXTENSION_INDEX); }
 void Context::set_extension(Object* object) { set(EXTENSION_INDEX, object); }
 
 
 JSModule* Context::module() { return JSModule::cast(get(EXTENSION_INDEX)); }
 void Context::set_module(JSModule* module) { set(EXTENSION_INDEX, module); }
 
 
-JSGlobalObject* Context::global_object() {
-  Object* result = get(GLOBAL_OBJECT_INDEX);
-  DCHECK(IsBootstrappingOrGlobalObject(this->GetIsolate(), result));
-  return reinterpret_cast<JSGlobalObject*>(result);
+Context* Context::native_context() {
+  Object* result = get(NATIVE_CONTEXT_INDEX);
+  DCHECK(IsBootstrappingOrNativeContext(this->GetIsolate(), result));
+  return reinterpret_cast<Context*>(result);
 }
 
 
-void Context::set_global_object(JSGlobalObject* object) {
-  set(GLOBAL_OBJECT_INDEX, object);
+void Context::set_native_context(Context* context) {
+  set(NATIVE_CONTEXT_INDEX, context);
 }
 
 
 bool Context::IsNativeContext() {
   Map* map = this->map();
   return map == map->GetHeap()->native_context_map();
 }
 
 
 bool Context::IsFunctionContext() {
@@ skipping 26 matching lines @@
 }
 
 
 bool Context::IsScriptContext() {
   Map* map = this->map();
   return map == map->GetHeap()->script_context_map();
 }
 
 
 bool Context::HasSameSecurityTokenAs(Context* that) {
-  return this->global_object()->native_context()->security_token() ==
-         that->global_object()->native_context()->security_token();
+  return this->native_context()->security_token() ==
+         that->native_context()->security_token();
 }
 
 
 #define NATIVE_CONTEXT_FIELD_ACCESSORS(index, type, name) \
   void Context::set_##name(type* value) {                 \
     DCHECK(IsNativeContext());                            \
     set(index, value);                                    \
   }                                                       \
   bool Context::is_##name(type* value) {                  \
     DCHECK(IsNativeContext());                            \
     return type::cast(get(index)) == value;               \
   }                                                       \
   type* Context::name() {                                 \
     DCHECK(IsNativeContext());                            \
     return type::cast(get(index));                        \
   }
 NATIVE_CONTEXT_FIELDS(NATIVE_CONTEXT_FIELD_ACCESSORS)
 #undef NATIVE_CONTEXT_FIELD_ACCESSORS
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_CONTEXTS_INL_H_