Move (uppercase) JS builtins from js builtins object to native context.

src/full-codegen/x64/full-codegen-x64.cc

Index: src/full-codegen/x64/full-codegen-x64.cc
diff --git a/src/full-codegen/x64/full-codegen-x64.cc b/src/full-codegen/x64/full-codegen-x64.cc
index 45de789b9e6368ee5fc1a8005380d20d5762c3b5..39d4f0cf7411ac21a1426016d6e71e5c9879162a 100644
--- a/src/full-codegen/x64/full-codegen-x64.cc
+++ b/src/full-codegen/x64/full-codegen-x64.cc
@@ -148,7 +148,7 @@ void FullCodeGenerator::Generate() {
         __ subp(rcx, Immediate(locals_count * kPointerSize));
         __ CompareRoot(rcx, Heap::kRealStackLimitRootIndex);
         __ j(above_equal, &ok, Label::kNear);
-        __ InvokeBuiltin(Builtins::STACK_OVERFLOW, CALL_FUNCTION);
+        __ InvokeBuiltin(Context::STACK_OVERFLOW_BUILTIN_INDEX, CALL_FUNCTION);
         __ bind(&ok);
       }
       __ LoadRoot(rdx, Heap::kUndefinedValueRootIndex);
@@ -1866,7 +1866,8 @@ void FullCodeGenerator::VisitArrayLiteral(ArrayLiteral* expr) {
     __ Push(rax);
     if (subexpr->IsSpread()) {
       VisitForStackValue(subexpr->AsSpread()->expression());
-      __ InvokeBuiltin(Builtins::CONCAT_ITERABLE_TO_ARRAY, CALL_FUNCTION);
+      __ InvokeBuiltin(Context::CONCAT_ITERABLE_TO_ARRAY_BUILTIN_INDEX,
+                       CALL_FUNCTION);
     } else {
       VisitForStackValue(subexpr);
       __ CallRuntime(Runtime::kAppendElement, 2);
@@ -4998,7 +4999,7 @@ void FullCodeGenerator::VisitCompareOperation(CompareOperation* expr) {
   switch (op) {
     case Token::IN:
       VisitForStackValue(expr->right());
-      __ InvokeBuiltin(Builtins::IN, CALL_FUNCTION);
+      __ InvokeBuiltin(Context::IN_BUILTIN_INDEX, CALL_FUNCTION);
       PrepareForBailoutBeforeSplit(expr, false, NULL, NULL);
       __ CompareRoot(rax, Heap::kTrueValueRootIndex);
       Split(equal, if_true, if_false, fall_through);