Pass embedding app identity through at embed time

mojo/services/public/cpp/view_manager/tests/view_manager_unittest.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "mojo/services/public/cpp/view_manager/view_manager.h"
 
 #include "base/auto_reset.h"
 #include "base/bind.h"
 #include "base/logging.h"
 #include "mojo/public/cpp/application/application.h"
@@ skipping 687 matching lines @@
 TEST_F(ViewManagerTest, MultiRoots) {
   ViewTreeNode* node1 = ViewTreeNode::Create(window_manager());
   window_manager()->GetRoots().front()->AddChild(node1);
   ViewTreeNode* node2 = ViewTreeNode::Create(window_manager());
   window_manager()->GetRoots().front()->AddChild(node2);
   ViewManager* embedded1 = Embed(window_manager(), node1);
   ViewManager* embedded2 = Embed(window_manager(), node2);
   EXPECT_EQ(embedded1, embedded2);
 }
 
+TEST_F(ViewManagerTest, EmbeddingIdentity) {
+  ViewTreeNode* node = ViewTreeNode::Create(window_manager());
+  window_manager()->GetRoots().front()->AddChild(node);
+  ViewManager* embedded = Embed(window_manager(), node);
+  EXPECT_EQ(kWindowManagerURL, embedded->GetEmbedderURL());
+}
+
 }  // namespace view_manager
 }  // namespace mojo