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

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

Index: src/crankshaft/arm/lithium-codegen-arm.cc
diff --git a/src/crankshaft/arm/lithium-codegen-arm.cc b/src/crankshaft/arm/lithium-codegen-arm.cc
index 4059774e3d7cab1852cd49f4736afeff61bdc77e..bb4c933c9f252b4dba898ca019052bda077dcb4c 100644
--- a/src/crankshaft/arm/lithium-codegen-arm.cc
+++ b/src/crankshaft/arm/lithium-codegen-arm.cc
@@ -197,7 +197,7 @@
         // Load parameter from stack.
         __ ldr(r0, MemOperand(fp, parameter_offset));
         // Store it in the context.
-        MemOperand target = ContextMemOperand(cp, var->index());
+        MemOperand target = ContextOperand(cp, var->index());
         __ str(r0, target);
         // Update the write barrier. This clobbers r3 and r0.
         if (need_write_barrier) {
@@ -2813,7 +2813,7 @@
 void LCodeGen::DoLoadContextSlot(LLoadContextSlot* instr) {
   Register context = ToRegister(instr->context());
   Register result = ToRegister(instr->result());
-  __ ldr(result, ContextMemOperand(context, instr->slot_index()));
+  __ ldr(result, ContextOperand(context, instr->slot_index()));
   if (instr->hydrogen()->RequiresHoleCheck()) {
     __ LoadRoot(ip, Heap::kTheHoleValueRootIndex);
     __ cmp(result, ip);
@@ -2830,7 +2830,7 @@
   Register context = ToRegister(instr->context());
   Register value = ToRegister(instr->value());
   Register scratch = scratch0();
-  MemOperand target = ContextMemOperand(context, instr->slot_index());
+  MemOperand target = ContextOperand(context, instr->slot_index());
 
   Label skip_assignment;
 
@@ -3292,8 +3292,9 @@
   __ b(&result_in_receiver);
   __ bind(&global_object);
   __ ldr(result, FieldMemOperand(function, JSFunction::kContextOffset));
-  __ ldr(result, ContextMemOperand(result, Context::NATIVE_CONTEXT_INDEX));
-  __ ldr(result, ContextMemOperand(result, Context::GLOBAL_PROXY_INDEX));
+  __ ldr(result,
+         ContextOperand(result, Context::GLOBAL_OBJECT_INDEX));
+  __ ldr(result, FieldMemOperand(result, JSGlobalObject::kGlobalProxyOffset));
 
   if (result.is(receiver)) {
     __ bind(&result_in_receiver);