Reland of ServiceWorker: Implement StartWorker by using mojo

content/renderer/service_worker/embedded_worker_dispatcher.h

Index: content/renderer/service_worker/embedded_worker_dispatcher.h
diff --git a/content/renderer/service_worker/embedded_worker_dispatcher.h b/content/renderer/service_worker/embedded_worker_dispatcher.h
index e77086f75e42e14132168fb88936cfb869e39884..9c706fa813191cbbf640661c069039200bb189ee 100644
--- a/content/renderer/service_worker/embedded_worker_dispatcher.h
+++ b/content/renderer/service_worker/embedded_worker_dispatcher.h
@@ -6,18 +6,29 @@
 #define CONTENT_RENDERER_SERVICE_WORKER_EMBEDDED_WORKER_DISPATCHER_H_
 
 #include <map>
+#include <memory>
 
 #include "base/id_map.h"
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "base/time/time.h"
+#include "content/child/scoped_child_process_reference.h"
 #include "content/public/common/console_message_level.h"
 #include "ipc/ipc_listener.h"
 
-struct EmbeddedWorkerMsg_StartWorker_Params;
 class GURL;
 
+namespace blink {
+
+class WebEmbeddedWorker;
+
+}  // namespace blink
+
 namespace content {
+
+class EmbeddedWorkerDevToolsAgent;
+class ServiceWorkerContextClient;
+struct EmbeddedWorkerStartParams;
 
 // A tiny dispatcher which handles embedded worker start/stop messages.
 class EmbeddedWorkerDispatcher : public IPC::Listener {
@@ -31,14 +42,36 @@
   void WorkerContextDestroyed(int embedded_worker_id);
 
  private:
-  class WorkerWrapper;
+  friend class EmbeddedWorkerInstanceClientImpl;
 
-  void OnStartWorker(const EmbeddedWorkerMsg_StartWorker_Params& params);
+  // A thin wrapper of WebEmbeddedWorker which also adds and releases process
+  // references automatically.
+  class WorkerWrapper {
+   public:
+    WorkerWrapper(blink::WebEmbeddedWorker* worker,
+                  int devtools_agent_route_id);
+    ~WorkerWrapper();
+
+    blink::WebEmbeddedWorker* worker() { return worker_.get(); }
+
+   private:
+    ScopedChildProcessReference process_ref_;
+    std::unique_ptr<blink::WebEmbeddedWorker> worker_;
+    std::unique_ptr<EmbeddedWorkerDevToolsAgent> dev_tools_agent_;
+  };
+
+  void OnStartWorker(const EmbeddedWorkerStartParams& params);
   void OnStopWorker(int embedded_worker_id);
   void OnResumeAfterDownload(int embedded_worker_id);
   void OnAddMessageToConsole(int embedded_worker_id,
                              ConsoleMessageLevel level,
                              const std::string& message);
+
+  std::unique_ptr<WorkerWrapper> StartWorkerContext(
+      const EmbeddedWorkerStartParams& params,
+      std::unique_ptr<ServiceWorkerContextClient> context_client);
+  void RegisterWorker(int embedded_worker_id,
+                      std::unique_ptr<WorkerWrapper> wrapper);
 
   IDMap<WorkerWrapper, IDMapOwnPointer> workers_;
   std::map<int /* embedded_worker_id */, base::TimeTicks> stop_worker_times_;