Add a instance groups to Connect(), and introduce an Identity struct.

components/resource_provider/resource_provider_app.cc

Index: components/resource_provider/resource_provider_app.cc
diff --git a/components/resource_provider/resource_provider_app.cc b/components/resource_provider/resource_provider_app.cc
index 43412393de356f01d880f3ce48ecdcc63c2b3a37..cd16a9889432c95bc516c82612aa3fc6952c4063 100644
--- a/components/resource_provider/resource_provider_app.cc
+++ b/components/resource_provider/resource_provider_app.cc
@@ -22,15 +22,14 @@ ResourceProviderApp::~ResourceProviderApp() {
 }
 
 void ResourceProviderApp::Initialize(mojo::Connector* connector,
-                                     const std::string& url,
-                                     const std::string& user_id,
+                                     const mojo::Identity& identity,
                                      uint32_t id) {
-  tracing_.Initialize(connector, url);
+  tracing_.Initialize(connector, identity.name());
 }
 
 bool ResourceProviderApp::AcceptConnection(mojo::Connection* connection) {
   const base::FilePath app_path(
-      GetPathForApplicationName(connection->GetRemoteApplicationName()));
+      GetPathForApplicationName(connection->GetRemoteIdentity().name()));
   if (app_path.empty())
     return false;  // The specified app has no resources.
 
@@ -42,7 +41,7 @@ void ResourceProviderApp::Create(
     mojo::Connection* connection,
     mojo::InterfaceRequest<ResourceProvider> request) {
   const base::FilePath app_path(
-      GetPathForApplicationName(connection->GetRemoteApplicationName()));
+      GetPathForApplicationName(connection->GetRemoteIdentity().name()));
   // We validated path at AcceptConnection() time, so it should still
   // be valid.
   CHECK(!app_path.empty());