ia32: Fuse map and type checks in call ICs for API functions.

src/x64/stub-cache-x64.cc

Index: src/x64/stub-cache-x64.cc
diff --git a/src/x64/stub-cache-x64.cc b/src/x64/stub-cache-x64.cc
index 693447b5c2786a7d9177edadcb2bd3e7b4291453..1f5267e147d401d9f2877a510250be5adc573a0b 100644
--- a/src/x64/stub-cache-x64.cc
+++ b/src/x64/stub-cache-x64.cc
@@ -1665,7 +1665,11 @@ Register StubCompiler::CheckPrototypes(JSObject* object,
                                        Register holder_reg,
                                        Register scratch,
                                        String* name,
+                                       int save_at_depth,
                                        Label* miss) {
+  // TODO(<bug>): support object saving.
+  ASSERT(save_at_depth == kInvalidProtoDepth);
+
   // Check that the maps haven't changed.
   Register result =
       __ CheckMaps(object, object_reg, holder, holder_reg, scratch, miss);