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

content/public/test/test_mojo_app.cc

Index: content/public/test/test_mojo_app.cc
diff --git a/content/public/test/test_mojo_app.cc b/content/public/test/test_mojo_app.cc
index 7c5fdb94c1bddb7c2a825735a87c0524a72d11d2..253c64fbe8005994cbe5dc2ab35319f43b05a156 100644
--- a/content/public/test/test_mojo_app.cc
+++ b/content/public/test/test_mojo_app.cc
@@ -22,7 +22,7 @@ TestMojoApp::~TestMojoApp() {
 }
 
 bool TestMojoApp::AcceptConnection(mojo::Connection* connection) {
-  requestor_name_ = connection->GetRemoteApplicationName();
+  requestor_name_ = connection->GetRemoteIdentity().name();
   connection->AddInterface<TestMojoService>(this);
   return true;
 }