Add ability APIs for opening a window with a url embedded, focusing and activating a window.

mojo/services/public/cpp/view_manager/lib/view_manager_client_impl.cc

Index: mojo/services/public/cpp/view_manager/lib/view_manager_client_impl.cc
diff --git a/mojo/services/public/cpp/view_manager/lib/view_manager_client_impl.cc b/mojo/services/public/cpp/view_manager/lib/view_manager_client_impl.cc
index 76bf054e58de3ad0005c3d242a3162041c38ec86..de55736d2c1c913e0ff63f76995d223f77fd8ee6 100644
--- a/mojo/services/public/cpp/view_manager/lib/view_manager_client_impl.cc
+++ b/mojo/services/public/cpp/view_manager/lib/view_manager_client_impl.cc
@@ -532,7 +532,6 @@ ViewManagerClientImpl::ViewManagerClientImpl(ApplicationConnection* connection,
       dispatcher_(NULL) {}
 
 ViewManagerClientImpl::~ViewManagerClientImpl() {
-  delegate_->OnViewManagerDisconnected(this);
   while (!nodes_.empty()) {
     IdToNodeMap::iterator it = nodes_.begin();
     if (OwnsNode(it->second->id()))
@@ -547,6 +546,7 @@ ViewManagerClientImpl::~ViewManagerClientImpl() {
     else
       views_.erase(it);
   }
+  delegate_->OnViewManagerDisconnected(this);
 }
 
 Id ViewManagerClientImpl::CreateNode() {