Add flag trap_on_stub_deopt. We want to be able to trap on hydrogen stub bailouts.

src/compiler.h

Index: src/compiler.h
diff --git a/src/compiler.h b/src/compiler.h
index 50053e562512d29ce3177816af11eaf101206e51..47d459a28206252581c9d4c35a2b0f42228864e8 100644
--- a/src/compiler.h
+++ b/src/compiler.h
@@ -199,6 +199,11 @@ class CompilationInfo {
     return IsCompilingForDebugging::decode(flags_);
   }
 
+  bool ShouldTrapOnDeopt() const {
+    return (FLAG_trap_on_deopt && IsOptimizing()) ||
+        (FLAG_trap_on_stub_deopt && IsStub());
+  }
+
   bool has_global_object() const {
     return !closure().is_null() &&
         (closure()->context()->global_object() != NULL);