Make rewind work on DBC

runtime/vm/stub_code_dbc.cc

Index: runtime/vm/stub_code_dbc.cc
diff --git a/runtime/vm/stub_code_dbc.cc b/runtime/vm/stub_code_dbc.cc
index 545a70ef7a62d2355958e0b604eea7a27e1e2acc..bf3783b1fd88c8a0035f08bca13fd7d98b952f29 100644
--- a/runtime/vm/stub_code_dbc.cc
+++ b/runtime/vm/stub_code_dbc.cc
@@ -47,9 +47,8 @@ void StubCode::GenerateRunExceptionHandlerStub(Assembler* assembler) {
 }
 
 
-// Not executed, but used as a sentinel in Simulator::JumpToFrame.
 void StubCode::GenerateDeoptForRewindStub(Assembler* assembler) {
-  __ Trap();
+  __ DeoptRewind();
 }