PlzNavigate: Make ServiceWorker work with PlzNavigate.

content/browser/service_worker/service_worker_context_core.h

Index: content/browser/service_worker/service_worker_context_core.h
diff --git a/content/browser/service_worker/service_worker_context_core.h b/content/browser/service_worker/service_worker_context_core.h
index 3cc735fc38913331d22f262369cfcc9f5b6ddaa1..ec02ba3273c60552db22e624fe6aa96b44a5a2cd 100644
--- a/content/browser/service_worker/service_worker_context_core.h
+++ b/content/browser/service_worker/service_worker_context_core.h
@@ -159,6 +159,14 @@ class CONTENT_EXPORT ServiceWorkerContextCore
   scoped_ptr<ProviderHostIterator> GetClientProviderHostIterator(
       const GURL& origin);
 
+  // PlzNavigate
+  // Methods to manage the list of ProviderHosts for navigation requests.
+  void AddNavigationProviderHost(ServiceWorkerProviderHost* provider_host);
+  // Returns nullptr if the ProviderHost with id |provider_id| is not present.
+  ServiceWorkerProviderHost* TakeNavigationProviderHost(int provider_id);
+  // Noop if the ProviderHost with id |provider_id| is not present.
+  void RemoveNavigationProviderHost(int provider_id);
+
   // Maintains a map from Client UUID to ProviderHost.
   // (Note: instead of maintaining 2 maps we might be able to uniformly use
   // UUID instead of process_id+provider_id elsewhere. For now I'm leaving
@@ -289,6 +297,11 @@ class CONTENT_EXPORT ServiceWorkerContextCore
   std::map<int64, ServiceWorkerRegistration*> live_registrations_;
   std::map<int64, ServiceWorkerVersion*> live_versions_;
   std::map<int64, scoped_refptr<ServiceWorkerVersion>> protected_versions_;
+
+  // PlzNavigate
+  // Map of ServiceWorkerProviderHost used for navigation requests.
+  std::map<int, ServiceWorkerProviderHost*> navigation_provider_host_map_;
+
   int next_handle_id_;
   int next_registration_handle_id_;
   // Set in RegisterServiceWorker(), cleared in ClearAllServiceWorkersForTest().