Hide some runtime functions.

src/x64/macro-assembler-x64.cc

Index: src/x64/macro-assembler-x64.cc
diff --git a/src/x64/macro-assembler-x64.cc b/src/x64/macro-assembler-x64.cc
index b5b7324be0af31dbe9e1a0b0b760d9c17190a282..8fe42dc98adb3858853af262a1a63453b9088da5 100644
--- a/src/x64/macro-assembler-x64.cc
+++ b/src/x64/macro-assembler-x64.cc
@@ -800,7 +800,7 @@ void MacroAssembler::CallApiFunctionAndReturn(
   bind(&promote_scheduled_exception);
   {
     FrameScope frame(this, StackFrame::INTERNAL);
-    CallRuntime(Runtime::kPromoteScheduledException, 0);
+    CallRuntime(Runtime::kHiddenPromoteScheduledException, 0);
   }
   jmp(&exception_handled);
 
@@ -3303,9 +3303,9 @@ void MacroAssembler::Throw(BailoutReason reason) {
     // We don't actually want to generate a pile of code for this, so just
     // claim there is a stack frame, without generating one.
     FrameScope scope(this, StackFrame::NONE);
-    CallRuntime(Runtime::kThrowMessage, 1);
+    CallRuntime(Runtime::kHiddenThrowMessage, 1);
   } else {
-    CallRuntime(Runtime::kThrowMessage, 1);
+    CallRuntime(Runtime::kHiddenThrowMessage, 1);
   }
   // Control will not return here.
   int3();