[runtime] TailCallRuntime and CallRuntime should use default argument counts

src/x64/macro-assembler-x64.h

Index: src/x64/macro-assembler-x64.h
diff --git a/src/x64/macro-assembler-x64.h b/src/x64/macro-assembler-x64.h
index cf3245aa57fc4a8b84024a53e11697d8a105177c..83ef957288104d0ff127918dca3a106bfb130162 100644
--- a/src/x64/macro-assembler-x64.h
+++ b/src/x64/macro-assembler-x64.h
@@ -1404,32 +1404,32 @@ class MacroAssembler: public Assembler {
                    SaveFPRegsMode save_doubles = kDontSaveFPRegs);
 
   // Call a runtime function and save the value of XMM registers.
-  void CallRuntimeSaveDoubles(Runtime::FunctionId id) {
-    const Runtime::Function* function = Runtime::FunctionForId(id);
+  void CallRuntimeSaveDoubles(Runtime::FunctionId fid) {
+    const Runtime::Function* function = Runtime::FunctionForId(fid);
     CallRuntime(function, function->nargs, kSaveFPRegs);
   }
 
   // Convenience function: Same as above, but takes the fid instead.
-  void CallRuntime(Runtime::FunctionId id,
-                   int num_arguments,
+  void CallRuntime(Runtime::FunctionId fid,
+                   SaveFPRegsMode save_doubles = kDontSaveFPRegs) {
+    const Runtime::Function* function = Runtime::FunctionForId(fid);
+    CallRuntime(function, function->nargs, save_doubles);
+  }
+
+  // Convenience function: Same as above, but takes the fid instead.
+  void CallRuntime(Runtime::FunctionId fid, int num_arguments,
                    SaveFPRegsMode save_doubles = kDontSaveFPRegs) {
-    CallRuntime(Runtime::FunctionForId(id), num_arguments, save_doubles);
+    CallRuntime(Runtime::FunctionForId(fid), num_arguments, save_doubles);
   }
 
   // Convenience function: call an external reference.
   void CallExternalReference(const ExternalReference& ext,
                              int num_arguments);
 
-  // Tail call of a runtime routine (jump).
-  // Like JumpToExternalReference, but also takes care of passing the number
-  // of parameters.
-  void TailCallExternalReference(const ExternalReference& ext,
-                                 int num_arguments);
-
-  // Convenience function: tail call a runtime routine (jump).
-  void TailCallRuntime(Runtime::FunctionId fid, int num_arguments);
+  // Convenience function: tail call a runtime routine (jump)
+  void TailCallRuntime(Runtime::FunctionId fid);
 
-  // Jump to a runtime routine.
+  // Jump to a runtime routines
   void JumpToExternalReference(const ExternalReference& ext);
 
   // Before calling a C-function from generated code, align arguments on stack.