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

src/compiler.h

Index: src/compiler.h
diff --git a/src/compiler.h b/src/compiler.h
index a2e85f262679bc5a00775ae2ae7439a4a5ed9076..759728b0a285f68bdb1aec751a77de9fce15ceba 100644
--- a/src/compiler.h
+++ b/src/compiler.h
@@ -288,19 +288,18 @@ class CompilationInfo {
         (FLAG_trap_on_stub_deopt && IsStub());
   }
 
-  bool has_global_object() const {
-    return !closure().is_null() &&
-        (closure()->context()->global_object() != NULL);
+  bool has_native_context() const {
+    return !closure().is_null() && (closure()->native_context() != nullptr);
   }
 
-  JSGlobalObject* global_object() const {
-    return has_global_object() ? closure()->context()->global_object() : NULL;
+  Context* native_context() const {
+    return has_native_context() ? closure()->native_context() : nullptr;
   }
 
-  bool has_native_context() const { return has_global_object(); }
+  bool has_global_object() const { return has_native_context(); }
 
-  Context* native_context() const {
-    return has_native_context() ? global_object()->native_context() : nullptr;
+  JSGlobalObject* global_object() const {
+    return has_global_object() ? native_context()->global_object() : nullptr;
   }
 
   // Accessors for the different compilation modes.