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

src/crankshaft/ia32/lithium-codegen-ia32.cc

Index: src/crankshaft/ia32/lithium-codegen-ia32.cc
diff --git a/src/crankshaft/ia32/lithium-codegen-ia32.cc b/src/crankshaft/ia32/lithium-codegen-ia32.cc
index 7ea170f80c03d789efe9c71334f63455955b91eb..7c9405db0a31e70fdf081ee51a290bf338974464 100644
--- a/src/crankshaft/ia32/lithium-codegen-ia32.cc
+++ b/src/crankshaft/ia32/lithium-codegen-ia32.cc
@@ -3188,8 +3188,10 @@
   __ jmp(&receiver_ok, Label::kNear);
   __ bind(&global_object);
   __ mov(receiver, FieldOperand(function, JSFunction::kContextOffset));
-  __ mov(receiver, ContextOperand(receiver, Context::NATIVE_CONTEXT_INDEX));
-  __ mov(receiver, ContextOperand(receiver, Context::GLOBAL_PROXY_INDEX));
+  const int global_offset = Context::SlotOffset(Context::GLOBAL_OBJECT_INDEX);
+  __ mov(receiver, Operand(receiver, global_offset));
+  const int proxy_offset = JSGlobalObject::kGlobalProxyOffset;
+  __ mov(receiver, FieldOperand(receiver, proxy_offset));
   __ bind(&receiver_ok);
 }