Unify runtime-style IC functions with Runtime intrinsics

src/runtime/runtime-debug.cc

Index: src/runtime/runtime-debug.cc
diff --git a/src/runtime/runtime-debug.cc b/src/runtime/runtime-debug.cc
index f4c81c8c72b5ff499e66276462245f70e7acadb2..f167fa6199f809e36cee69efc33ce255bbf35402 100644
--- a/src/runtime/runtime-debug.cc
+++ b/src/runtime/runtime-debug.cc
@@ -19,6 +19,17 @@ namespace internal {
 RUNTIME_FUNCTION(Runtime_DebugBreak) {
   SealHandleScope shs(isolate);
   DCHECK(args.length() == 0);
+  // Get the top-most JavaScript frame.
+  JavaScriptFrameIterator it(isolate);
+  isolate->debug()->Break(args, it.frame());
+  isolate->debug()->SetAfterBreakTarget(it.frame());
+  return isolate->heap()->undefined_value();
+}
+
+
+RUNTIME_FUNCTION(Runtime_HandleDebuggerStatement) {
+  SealHandleScope shs(isolate);
+  DCHECK(args.length() == 0);
   isolate->debug()->HandleDebugBreak();
   return isolate->heap()->undefined_value();
 }