Introduce worker_devtools_agent_route_id for EmbeddedWorker.

content/browser/service_worker/service_worker_dispatcher_host_unittest.cc

Index: content/browser/service_worker/service_worker_dispatcher_host_unittest.cc
diff --git a/content/browser/service_worker/service_worker_dispatcher_host_unittest.cc b/content/browser/service_worker/service_worker_dispatcher_host_unittest.cc
index 8a407eff05ef0604dea3f10257d4646b0ab92d39..d66f01ebe9b062dd3f98c35e2da9fecbb3c37270 100644
--- a/content/browser/service_worker/service_worker_dispatcher_host_unittest.cc
+++ b/content/browser/service_worker/service_worker_dispatcher_host_unittest.cc
@@ -4,6 +4,8 @@
 
 #include "content/browser/service_worker/service_worker_dispatcher_host.h"
 
+#include "base/atomic_sequence_num.h"
+#include "base/bind.h"
 #include "base/command_line.h"
 #include "base/files/file_path.h"
 #include "base/run_loop.h"
@@ -59,7 +61,9 @@ class TestingServiceWorkerDispatcherHost : public ServiceWorkerDispatcherHost {
       : ServiceWorkerDispatcherHost(process_id, NULL),
         bad_messages_received_count_(0),
         helper_(helper) {
-    Init(context_wrapper);
+    Init(context_wrapper,
+         base::Bind(&base::AtomicSequenceNumber::GetNext,
+                    base::Unretained(&next_routing_id_)));
   }
 
   virtual bool Send(IPC::Message* message) OVERRIDE {
@@ -76,6 +80,7 @@ class TestingServiceWorkerDispatcherHost : public ServiceWorkerDispatcherHost {
 
  protected:
   EmbeddedWorkerTestHelper* helper_;
+  base::AtomicSequenceNumber next_routing_id_;
   virtual ~TestingServiceWorkerDispatcherHost() {}
 };