Teach EmbeddedWorkerInstance to create a process when it needs one.

content/browser/service_worker/service_worker_browsertest.cc

Index: content/browser/service_worker/service_worker_browsertest.cc
diff --git a/content/browser/service_worker/service_worker_browsertest.cc b/content/browser/service_worker/service_worker_browsertest.cc
index 60a98499d8cd818b20762b14eaf096129a69b5a0..6ab1e7d245e036976b9a7a395fcab4e631703464 100644
--- a/content/browser/service_worker/service_worker_browsertest.cc
+++ b/content/browser/service_worker/service_worker_browsertest.cc
@@ -164,9 +164,17 @@ class EmbeddedWorkerBrowserTest : public ServiceWorkerBrowserTest,
     const GURL scope = embedded_test_server()->GetURL("/*");
     const GURL script_url = embedded_test_server()->GetURL(
         "/service_worker/worker.js");
-    ServiceWorkerStatusCode status = worker_->Start(
-        service_worker_version_id, scope, script_url);
-
+    std::vector<int> processes;
+    processes.push_back(
+        shell()->web_contents()->GetRenderProcessHost()->GetID());
+    worker_->Start(
+        service_worker_version_id,
+        scope,
+        script_url,
+        processes,
+        base::Bind(&EmbeddedWorkerBrowserTest::StartOnIOThread2, this));
+  }
+  void StartOnIOThread2(ServiceWorkerStatusCode status) {
     last_worker_status_ = worker_->status();
     EXPECT_EQ(SERVICE_WORKER_OK, status);
     EXPECT_EQ(EmbeddedWorkerInstance::STARTING, last_worker_status_);
@@ -596,7 +604,6 @@ IN_PROC_BROWSER_TEST_F(ServiceWorkerBlackBoxBrowserTest, Registration) {
     public_context()->RegisterServiceWorker(
         embedded_test_server()->GetURL("/*"),
         embedded_test_server()->GetURL(kWorkerUrl),
-        RenderProcessID(),
         base::Bind(&ServiceWorkerBlackBoxBrowserTest::ExpectResultAndRun,
                    true,
                    run_loop.QuitClosure()));
@@ -610,7 +617,6 @@ IN_PROC_BROWSER_TEST_F(ServiceWorkerBlackBoxBrowserTest, Registration) {
     public_context()->RegisterServiceWorker(
         embedded_test_server()->GetURL("/*"),
         embedded_test_server()->GetURL(kWorkerUrl),
-        RenderProcessID(),
         base::Bind(&ServiceWorkerBlackBoxBrowserTest::ExpectResultAndRun,
                    true,
                    run_loop.QuitClosure()));