Issue 485: Fix leak of builtins object through call and apply functions.

src/x64/builtins-x64.cc

Index: src/x64/builtins-x64.cc
diff --git a/src/x64/builtins-x64.cc b/src/x64/builtins-x64.cc
index ea6c37902afad75d0dfba7433bdbe54cedf5545d..8590365a175c3e4e07a2195df073e7b93b725619 100644
--- a/src/x64/builtins-x64.cc
+++ b/src/x64/builtins-x64.cc
@@ -246,6 +246,8 @@ void Builtins::Generate_FunctionCall(MacroAssembler* masm) {
     const int kGlobalIndex =
         Context::kHeaderSize + Context::GLOBAL_INDEX * kPointerSize;
     __ movq(rbx, FieldOperand(rsi, kGlobalIndex));
+    __ movq(rbx, FieldOperand(rbx, GlobalObject::kGlobalContextOffset));
+    __ movq(rbx, FieldOperand(rbx, kGlobalIndex));
     __ movq(rbx, FieldOperand(rbx, GlobalObject::kGlobalReceiverOffset));
 
     __ bind(&patch_receiver);
@@ -400,6 +402,8 @@ void Builtins::Generate_FunctionApply(MacroAssembler* masm) {
   const int kGlobalOffset =
       Context::kHeaderSize + Context::GLOBAL_INDEX * kPointerSize;
   __ movq(rbx, FieldOperand(rsi, kGlobalOffset));
+  __ movq(rbx, FieldOperand(rbx, GlobalObject::kGlobalContextOffset));
+  __ movq(rbx, FieldOperand(rbx, kGlobalOffset));
   __ movq(rbx, FieldOperand(rbx, GlobalObject::kGlobalReceiverOffset));
 
   // Push the receiver.