PlzNavigate: Make ServiceWorker work with PlzNavigate.

content/child/service_worker/service_worker_network_provider.cc

Index: content/child/service_worker/service_worker_network_provider.cc
diff --git a/content/child/service_worker/service_worker_network_provider.cc b/content/child/service_worker/service_worker_network_provider.cc
index bd521b844840a88aafba94bd15e409986a85adae..2e5a51c5b066565d18c0476cb6561c1853b3e7d1 100644
--- a/content/child/service_worker/service_worker_network_provider.cc
+++ b/content/child/service_worker/service_worker_network_provider.cc
@@ -5,9 +5,12 @@
 #include "content/child/service_worker/service_worker_network_provider.h"
 
 #include "base/atomic_sequence_num.h"
+#include "base/command_line.h"
 #include "content/child/child_thread_impl.h"
 #include "content/child/service_worker/service_worker_provider_context.h"
 #include "content/common/service_worker/service_worker_messages.h"
+#include "content/common/service_worker/service_worker_utils.h"
+#include "content/public/common/content_switches.h"
 
 namespace content {
 
@@ -46,17 +49,39 @@ ServiceWorkerNetworkProvider* ServiceWorkerNetworkProvider::FromDocumentState(
 
 ServiceWorkerNetworkProvider::ServiceWorkerNetworkProvider(
     int route_id,
-    ServiceWorkerProviderType provider_type)
-    : provider_id_(GenerateProviderIdForType(provider_type)) {
+    ServiceWorkerProviderType provider_type,
+    int browser_provider_id) {
+  provider_id_ = kInvalidServiceWorkerProviderId;
+  if (ServiceWorkerUtils::IsBrowserAssignedProviderId(browser_provider_id)) {
+    // PlzNavigate
+    CHECK(base::CommandLine::ForCurrentProcess()->HasSwitch(
+        switches::kEnableBrowserSideNavigation));
+    // This was a browser-initiated navigation, the ServiceWorkerProviderHost
+    // has already been initialized, copy the provider_id value.
+    provider_id_ = browser_provider_id;
+  } else {
+    // Initialize a new provider ID in all other cases.
+    DCHECK_EQ(kInvalidServiceWorkerProviderId, browser_provider_id);
+    provider_id_ = GenerateProviderIdForType(provider_type);
+  }
   if (provider_id_ == kInvalidServiceWorkerProviderId)
     return;
+
   context_ = new ServiceWorkerProviderContext(provider_id_);
   if (!ChildThreadImpl::current())
     return;  // May be null in some tests.
+
   ChildThreadImpl::current()->Send(new ServiceWorkerHostMsg_ProviderCreated(
       provider_id_, route_id, provider_type));
 }
 
+ServiceWorkerNetworkProvider::ServiceWorkerNetworkProvider(
+    int route_id,
+    ServiceWorkerProviderType provider_type)
+    : ServiceWorkerNetworkProvider(route_id,
+                                   provider_type,
+                                   kInvalidServiceWorkerProviderId) {}
+
 ServiceWorkerNetworkProvider::~ServiceWorkerNetworkProvider() {
   if (provider_id_ == kInvalidServiceWorkerProviderId)
     return;