Check the ServiceWorker Version ID in EmbeddedWorkerInstance::Start() in release builds.

content/browser/service_worker/embedded_worker_instance.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/browser/service_worker/embedded_worker_instance.h"
 
 #include "base/bind_helpers.h"
 #include "base/metrics/histogram_macros.h"
 #include "base/threading/non_thread_safe.h"
 #include "base/trace_event/trace_event.h"
@@ skipping 131 matching lines @@
 void EmbeddedWorkerInstance::Start(int64 service_worker_version_id,
                                    const GURL& scope,
                                    const GURL& script_url,
                                    const StatusCallback& callback) {
   if (!context_) {
     callback.Run(SERVICE_WORKER_ERROR_ABORT);
     // |this| may be destroyed by the callback.
     return;
   }
   DCHECK(status_ == STOPPED);
+  // TODO(horo): If we will see crashes here, we have to find the root cause of
+  // the invalid version ID. Otherwise change CHECK to DCHECK.
+  CHECK_NE(service_worker_version_id, kInvalidServiceWorkerVersionId);
   start_timing_ = base::TimeTicks::Now();
   status_ = STARTING;
   starting_phase_ = ALLOCATING_PROCESS;
   network_accessed_for_script_ = false;
   service_registry_.reset(new ServiceRegistryImpl());
   FOR_EACH_OBSERVER(Listener, listener_list_, OnStarting());
   scoped_ptr<EmbeddedWorkerMsg_StartWorker_Params> params(
       new EmbeddedWorkerMsg_StartWorker_Params());
   TRACE_EVENT_ASYNC_BEGIN2("ServiceWorker",
                            "EmbeddedWorkerInstance::ProcessAllocate",
@@ skipping 400 matching lines @@
     case SCRIPT_READ_FINISHED:
       return "Script read finished";
     case STARTING_PHASE_MAX_VALUE:
       NOTREACHED();
   }
   NOTREACHED() << phase;
   return std::string();
 }
 
 }  // namespace content