Call JS functions via native context instead of js builtins object.

src/full-codegen/arm/full-codegen-arm.cc

Index: src/full-codegen/arm/full-codegen-arm.cc
diff --git a/src/full-codegen/arm/full-codegen-arm.cc b/src/full-codegen/arm/full-codegen-arm.cc
index 891888d232def562938c690516bb0c84a7326abe..201c21eececefa125c21e2151557014858fae9d9 100644
--- a/src/full-codegen/arm/full-codegen-arm.cc
+++ b/src/full-codegen/arm/full-codegen-arm.cc
@@ -4531,17 +4531,13 @@ void FullCodeGenerator::EmitDebugIsActive(CallRuntime* expr) {
 
 
 void FullCodeGenerator::EmitLoadJSRuntimeFunction(CallRuntime* expr) {
-  // Push the builtins object as the receiver.
-  Register receiver = LoadDescriptor::ReceiverRegister();
-  __ ldr(receiver, GlobalObjectOperand());
-  __ ldr(receiver, FieldMemOperand(receiver, GlobalObject::kBuiltinsOffset));
-  __ push(receiver);
+  // Push undefined as the receiver.
+  __ LoadRoot(r0, Heap::kUndefinedValueRootIndex);
+  __ push(r0);
 
-  // Load the function from the receiver.
-  __ mov(LoadDescriptor::NameRegister(), Operand(expr->name()));
-  __ mov(LoadDescriptor::SlotRegister(),
-         Operand(SmiFromSlot(expr->CallRuntimeFeedbackSlot())));
-  CallLoadIC(NOT_INSIDE_TYPEOF);
+  __ ldr(r0, GlobalObjectOperand());
+  __ ldr(r0, FieldMemOperand(r0, GlobalObject::kNativeContextOffset));
+  __ ldr(r0, ContextOperand(r0, expr->context_index()));
 }