ServiceWorker: Fix crash during shutdown in single-process mode

content/browser/service_worker/service_worker_process_manager.cc

Index: content/browser/service_worker/service_worker_process_manager.cc
diff --git a/content/browser/service_worker/service_worker_process_manager.cc b/content/browser/service_worker/service_worker_process_manager.cc
index f3ff0482c8fea21f03f94af83e4555d9e8fd1687..7033498b1143be6abce94cfbfc8137a9a5cf7100 100644
--- a/content/browser/service_worker/service_worker_process_manager.cc
+++ b/content/browser/service_worker/service_worker_process_manager.cc
@@ -77,11 +77,12 @@ void ServiceWorkerProcessManager::Shutdown() {
     browser_context_ = nullptr;
   }
 
-  for (std::map<int, ProcessInfo>::const_iterator it = instance_info_.begin();
-       it != instance_info_.end();
-       ++it) {
-    RenderProcessHost::FromID(it->second.process_id)
-        ->DecrementServiceWorkerRefCount();
+  if (!RenderProcessHost::run_renderer_in_process()) {

[nhiroki, 2017/04/17 23:26:21]

Could you add a comment about why we need to skip this in the single process
mode like the 1st paragraph on the CL description?

+    for (std::map<int, ProcessInfo>::const_iterator it = instance_info_.begin();
+         it != instance_info_.end(); ++it) {
+      RenderProcessHost::FromID(it->second.process_id)
+          ->DecrementServiceWorkerRefCount();
+    }
   }
   instance_info_.clear();
 }