Changes around how embed roots are set

components/html_viewer/html_frame_apptest.cc

Index: components/html_viewer/html_frame_apptest.cc
diff --git a/components/html_viewer/html_frame_apptest.cc b/components/html_viewer/html_frame_apptest.cc
index 2d452a83c11d7581bd5f7339d9a96f140235bdb6..10e4fba2ddbfb7b1fd316895247c748fa99ee273 100644
--- a/components/html_viewer/html_frame_apptest.cc
+++ b/components/html_viewer/html_frame_apptest.cc
@@ -230,9 +230,6 @@ class HTMLFrameTest : public ViewManagerTestBase {
   void SetUp() override {
     ViewManagerTestBase::SetUp();
 
-    // Make it so we get OnEmbedForDescendant().
-    window_manager()->SetEmbedRoot();
-
     // Start a test server.
     http_server_.reset(new net::SpawnedTestServer(
         net::SpawnedTestServer::TYPE_HTTP, net::SpawnedTestServer::kLocalhost,