WIP attempt to replace StartWorker/StopWorker IPCs with a new mojo EmbeddedWorker service.

content/browser/service_worker/embedded_worker_test_helper.h

Index: content/browser/service_worker/embedded_worker_test_helper.h
diff --git a/content/browser/service_worker/embedded_worker_test_helper.h b/content/browser/service_worker/embedded_worker_test_helper.h
index af112f5e164f87c67b8a7947abaf7f06873e813c..588f8be3edf6c49d3df65c2857fff192e43f632e 100644
--- a/content/browser/service_worker/embedded_worker_test_helper.h
+++ b/content/browser/service_worker/embedded_worker_test_helper.h
@@ -11,6 +11,7 @@
 
 #include "base/callback.h"
 #include "base/memory/weak_ptr.h"
+#include "content/common/mojo/service_registry_impl.h"
 #include "ipc/ipc_listener.h"
 #include "ipc/ipc_test_sink.h"
 #include "testing/gtest/include/gtest/gtest.h"
@@ -24,9 +25,11 @@ namespace content {
 class EmbeddedWorkerRegistry;
 class EmbeddedWorkerTestHelper;
 class MessagePortMessageFilter;
+class MockRenderProcessHost;
 class ServiceWorkerContextCore;
 class ServiceWorkerContextWrapper;
 struct ServiceWorkerFetchRequest;
+class TestBrowserContext;
 
 // In-Process EmbeddedWorker test helper.
 //
@@ -51,6 +54,7 @@ class EmbeddedWorkerTestHelper : public IPC::Sender,
   // the context makes storage stuff in memory.
   EmbeddedWorkerTestHelper(const base::FilePath& user_data_directory,
                            int mock_render_process_id);
+  explicit EmbeddedWorkerTestHelper(const base::FilePath& user_data_directory);
   ~EmbeddedWorkerTestHelper() override;
 
   // Call this to simulate add/associate a process to a pattern.
@@ -116,6 +120,8 @@ class EmbeddedWorkerTestHelper : public IPC::Sender,
 
   EmbeddedWorkerRegistry* registry();
 
+  friend class MockEmbeddedWorker;
+
  private:
   void OnStartWorkerStub(const EmbeddedWorkerMsg_StartWorker_Params& params);
   void OnStopWorkerStub(int embedded_worker_id);
@@ -139,6 +145,12 @@ class EmbeddedWorkerTestHelper : public IPC::Sender,
   int next_thread_id_;
   int mock_render_process_id_;
 
+  scoped_ptr<TestBrowserContext> browser_context_;
+
+  scoped_ptr<MockRenderProcessHost> render_process_host_;
+
+  ServiceRegistryImpl service_registry_;
+
   std::map<int, int64> embedded_worker_id_service_worker_version_id_map_;
 
   // Updated each time MessageToWorker message is received.