Use default argument count for runtime function calls.

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 132439b8291283fb84c891d25ef9191a723570f3..abbcaacf24a8ac1938436eace8adb2ef5bd88307 100644
--- a/src/x64/macro-assembler-x64.cc
+++ b/src/x64/macro-assembler-x64.cc
@@ -589,9 +589,9 @@ void MacroAssembler::Abort(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::kAbort, 1);
+    CallRuntime(Runtime::kAbort);
   } else {
-    CallRuntime(Runtime::kAbort, 1);
+    CallRuntime(Runtime::kAbort);
   }
   // Control will not return here.
   int3();
@@ -4212,7 +4212,7 @@ void MacroAssembler::FloodFunctionIfStepping(Register fun, Register new_target,
     }
     Push(fun);
     Push(fun);
-    CallRuntime(Runtime::kDebugPrepareStepInIfStepping, 1);
+    CallRuntime(Runtime::kDebugPrepareStepInIfStepping);
     Pop(fun);
     if (new_target.is_valid()) {
       Pop(new_target);