[liveedit] reimplement frame restarting.

src/compiler/js-generic-lowering.cc

Index: src/compiler/js-generic-lowering.cc
diff --git a/src/compiler/js-generic-lowering.cc b/src/compiler/js-generic-lowering.cc
index a5446d005b0dc218f26b9f4807a970a66b04fd6c..5a6b34a1235289a48711dd67f60511566b67c61d 100644
--- a/src/compiler/js-generic-lowering.cc
+++ b/src/compiler/js-generic-lowering.cc
@@ -668,6 +668,11 @@ void JSGenericLowering::LowerJSStackCheck(Node* node) {
   ReplaceWithRuntimeCall(node, Runtime::kStackGuard);
 }
 
+void JSGenericLowering::LowerJSDebugger(Node* node) {
+  CallDescriptor::Flags flags = FrameStateFlagForCall(node);
+  Callable callable = CodeFactory::HandleDebuggerStatement(isolate());
+  ReplaceWithStubCall(node, callable, flags);
+}
 
 Zone* JSGenericLowering::zone() const { return graph()->zone(); }