Revert of ServiceWorker: Change DCHECK to CHECK for debugging process allocation

content/browser/service_worker/embedded_worker_instance.cc

Index: content/browser/service_worker/embedded_worker_instance.cc
diff --git a/content/browser/service_worker/embedded_worker_instance.cc b/content/browser/service_worker/embedded_worker_instance.cc
index dde5e053ad47d4748be7dc2f0715e6d2857a64fe..17246a1f1bc6c450541f893130461e1b9bffd0ef 100644
--- a/content/browser/service_worker/embedded_worker_instance.cc
+++ b/content/browser/service_worker/embedded_worker_instance.cc
@@ -577,9 +577,8 @@
 void EmbeddedWorkerInstance::OnProcessAllocated(
     std::unique_ptr<WorkerProcessHandle> handle,
     ServiceWorkerMetrics::StartSituation start_situation) {
-  // TODO(shimazu): Change CHECK to DCHECK after crbug.com/668633 is fixed.
-  CHECK_EQ(EmbeddedWorkerStatus::STARTING, status_);
-  CHECK(!process_handle_);
+  DCHECK_EQ(EmbeddedWorkerStatus::STARTING, status_);
+  DCHECK(!process_handle_);
 
   process_handle_ = std::move(handle);
   starting_phase_ = REGISTERING_TO_DEVTOOLS;