ServiceWorker: adding a crash key to check if a new process is launched

blimp/engine/app/blimp_engine_crash_keys.cc

Index: blimp/engine/app/blimp_engine_crash_keys.cc
diff --git a/blimp/engine/app/blimp_engine_crash_keys.cc b/blimp/engine/app/blimp_engine_crash_keys.cc
index 848521c3420ded676b9f8ca780b2191c3124a386..dd2a258cf25196fef776000edbe43993925fe42a 100644
--- a/blimp/engine/app/blimp_engine_crash_keys.cc
+++ b/blimp/engine/app/blimp_engine_crash_keys.cc
@@ -103,6 +103,8 @@ size_t RegisterEngineCrashKeys() {
       // Temporary for https://crbug.com/668633.
       { "swdh_set_hosted_version_worker_pid", crash_keys::kSmallSize },
       { "swdh_set_hosted_version_host_pid", crash_keys::kSmallSize },
+      { "swdh_set_hosted_version_is_new_process", crash_keys::kSmallSize },
+      { "swdh_set_hosted_version_restart_count", crash_keys::kSmallSize },
     };
 
   return base::debug::InitCrashKeys(engine_keys, arraysize(engine_keys),