Reland of ServiceWorker: Implement StartWorker by using mojo

content/browser/service_worker/embedded_worker_instance.cc

Index: content/browser/service_worker/embedded_worker_instance.cc
diff --git a/content/browser/service_worker/embedded_worker_instance.cc b/content/browser/service_worker/embedded_worker_instance.cc
index 6c9dc1fc4e9250e9f9781c117285d15aa9745d5e..f2365771a03cdc888ea505ca6626c0771e68c0c6 100644
--- a/content/browser/service_worker/embedded_worker_instance.cc
+++ b/content/browser/service_worker/embedded_worker_instance.cc
@@ -20,11 +20,14 @@
 #include "content/common/service_worker/embedded_worker_messages.h"
 #include "content/common/service_worker/embedded_worker_settings.h"
 #include "content/common/service_worker/embedded_worker_setup.mojom.h"
+#include "content/common/service_worker/embedded_worker_start_params.h"
 #include "content/common/service_worker/service_worker_types.h"
+#include "content/common/service_worker/service_worker_utils.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/content_browser_client.h"
 #include "content/public/browser/render_process_host.h"
 #include "content/public/common/child_process_host.h"
+#include "content/public/common/content_switches.h"
 #include "ipc/ipc_message.h"
 #include "services/shell/public/cpp/interface_provider.h"
 #include "services/shell/public/cpp/interface_registry.h"
@@ -69,7 +72,7 @@
       worker_process_id, worker_route_id);
 }
 
-void RegisterToWorkerDevToolsManagerOnUI(
+void SetupOnUI(
     int process_id,
     const ServiceWorkerContextCore* service_worker_context,
     const base::WeakPtr<ServiceWorkerContextCore>& service_worker_context_weak,
@@ -77,6 +80,7 @@
     const GURL& url,
     const GURL& scope,
     bool is_installed,
+    mojom::EmbeddedWorkerInstanceClientRequest request,
     const base::Callback<void(int worker_devtools_agent_route_id,
                               bool wait_for_debugger)>& callback) {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
@@ -92,6 +96,8 @@
                 service_worker_context, service_worker_context_weak,
                 service_worker_version_id, url, scope),
             is_installed);
+    if (request.is_pending())
+      rph->GetRemoteInterfaces()->GetInterface(std::move(request));
   }
   BrowserThread::PostTask(
       BrowserThread::IO,
@@ -211,8 +217,11 @@
  public:
   enum class ProcessAllocationState { NOT_ALLOCATED, ALLOCATING, ALLOCATED };
 
-  StartTask(EmbeddedWorkerInstance* instance, const GURL& script_url)
+  StartTask(EmbeddedWorkerInstance* instance,
+            const GURL& script_url,
+            mojom::EmbeddedWorkerInstanceClientRequest request)
       : instance_(instance),
+        request_(std::move(request)),
         state_(ProcessAllocationState::NOT_ALLOCATED),
         is_installed_(false),
         started_during_browser_startup_(false),
@@ -254,7 +263,7 @@
     // TODO(nhiroki): Reconsider this bizarre layering.
   }
 
-  void Start(std::unique_ptr<EmbeddedWorkerMsg_StartWorker_Params> params,
+  void Start(std::unique_ptr<EmbeddedWorkerStartParams> params,
              const StatusCallback& callback) {
     DCHECK_CURRENTLY_ON(BrowserThread::IO);
     state_ = ProcessAllocationState::ALLOCATING;
@@ -289,12 +298,11 @@
   bool is_installed() const { return is_installed_; }
 
  private:
-  void OnProcessAllocated(
-      std::unique_ptr<EmbeddedWorkerMsg_StartWorker_Params> params,
-      ServiceWorkerStatusCode status,
-      int process_id,
-      bool is_new_process,
-      const EmbeddedWorkerSettings& settings) {
+  void OnProcessAllocated(std::unique_ptr<EmbeddedWorkerStartParams> params,
+                          ServiceWorkerStatusCode status,
+                          int process_id,
+                          bool is_new_process,
+                          const EmbeddedWorkerSettings& settings) {
     DCHECK_CURRENTLY_ON(BrowserThread::IO);
 
     if (status != SERVICE_WORKER_OK) {
@@ -342,23 +350,22 @@
     GURL script_url(params->script_url);
     BrowserThread::PostTask(
         BrowserThread::UI, FROM_HERE,
-        base::Bind(RegisterToWorkerDevToolsManagerOnUI, process_id,
-                   instance_->context_.get(), instance_->context_,
-                   service_worker_version_id, script_url, scope, is_installed_,
-                   base::Bind(&StartTask::OnRegisteredToDevToolsManager,
+        base::Bind(&SetupOnUI, process_id, instance_->context_.get(),
+                   instance_->context_, service_worker_version_id, script_url,
+                   scope, is_installed_, base::Passed(&request_),
+                   base::Bind(&StartTask::OnSetupOnUICompleted,
                               weak_factory_.GetWeakPtr(), base::Passed(&params),
                               is_new_process)));
   }
 
-  void OnRegisteredToDevToolsManager(
-      std::unique_ptr<EmbeddedWorkerMsg_StartWorker_Params> params,
-      bool is_new_process,
-      int worker_devtools_agent_route_id,
-      bool wait_for_debugger) {
+  void OnSetupOnUICompleted(std::unique_ptr<EmbeddedWorkerStartParams> params,
+                            bool is_new_process,
+                            int worker_devtools_agent_route_id,
+                            bool wait_for_debugger) {
     DCHECK_CURRENTLY_ON(BrowserThread::IO);
     TRACE_EVENT_ASYNC_STEP_PAST0("ServiceWorker",
                                  "EmbeddedWorkerInstance::Start", this,
-                                 "OnRegisteredToDevToolsManager");
+                                 "OnSetupOnUICompleted");
 
     // Notify the instance that it is registered to the devtools manager.
     instance_->OnRegisteredToDevToolsManager(
@@ -366,11 +373,14 @@
 
     params->worker_devtools_agent_route_id = worker_devtools_agent_route_id;
     params->wait_for_debugger = wait_for_debugger;
-    SendStartWorker(std::move(params));
-  }
-
-  void SendStartWorker(
-      std::unique_ptr<EmbeddedWorkerMsg_StartWorker_Params> params) {
+
+    if (ServiceWorkerUtils::IsMojoForServiceWorkerEnabled())
+      instance_->SendMojoStartWorker(std::move(params));
+    else
+      SendStartWorker(std::move(params));
+  }
+
+  void SendStartWorker(std::unique_ptr<EmbeddedWorkerStartParams> params) {
     DCHECK_CURRENTLY_ON(BrowserThread::IO);
     ServiceWorkerStatusCode status = instance_->registry_->SendStartWorker(
         std::move(params), instance_->process_id());
@@ -393,6 +403,10 @@
   // |instance_| must outlive |this|.
   EmbeddedWorkerInstance* instance_;
 
+  // Ownership is transferred by base::Passed() to a task after process
+  // allocation.
+  mojom::EmbeddedWorkerInstanceClientRequest request_;
+
   StatusCallback start_callback_;
   ProcessAllocationState state_;
 
@@ -421,7 +435,7 @@
 }
 
 void EmbeddedWorkerInstance::Start(
-    std::unique_ptr<EmbeddedWorkerMsg_StartWorker_Params> params,
+    std::unique_ptr<EmbeddedWorkerStartParams> params,
     const StatusCallback& callback) {
   if (!context_) {
     callback.Run(SERVICE_WORKER_ERROR_ABORT);
@@ -445,7 +459,12 @@
   params->wait_for_debugger = false;
   params->settings.v8_cache_options = GetV8CacheOptions();
 
-  inflight_start_task_.reset(new StartTask(this, params->script_url));
+  mojom::EmbeddedWorkerInstanceClientRequest request;
+  if (ServiceWorkerUtils::IsMojoForServiceWorkerEnabled())
+    request = mojo::GetProxy(&client_);
+
+  inflight_start_task_.reset(
+      new StartTask(this, params->script_url, std::move(request)));
   inflight_start_task_->Start(std::move(params), callback);
 }
 
@@ -565,6 +584,15 @@
   }
 }
 
+void EmbeddedWorkerInstance::SendMojoStartWorker(
+    std::unique_ptr<EmbeddedWorkerStartParams> params) {
+  client_->StartWorker(*params);
+  registry_->BindWorkerToProcess(process_id(), embedded_worker_id());
+  TRACE_EVENT_ASYNC_STEP_PAST1("ServiceWorker", "EmbeddedWorkerInstance::Start",
+                               this, "SendStartWorker", "Status", "mojo");
+  OnStartWorkerMessageSent();
+}
+
 void EmbeddedWorkerInstance::OnStartWorkerMessageSent() {
   if (!step_time_.is_null()) {
     base::TimeDelta duration = UpdateStepTime();
@@ -659,9 +687,10 @@
   FOR_EACH_OBSERVER(Listener, listener_list_, OnThreadStarted());
 
   shell::mojom::InterfaceProviderPtr exposed_interfaces;
-  interface_registry_->Bind(GetProxy(&exposed_interfaces));
+  interface_registry_->Bind(mojo::GetProxy(&exposed_interfaces));
   shell::mojom::InterfaceProviderPtr remote_interfaces;
-  shell::mojom::InterfaceProviderRequest request = GetProxy(&remote_interfaces);
+  shell::mojom::InterfaceProviderRequest request =
+      mojo::GetProxy(&remote_interfaces);
   remote_interfaces_->Bind(std::move(remote_interfaces));
   BrowserThread::PostTask(
       BrowserThread::UI, FROM_HERE,