Changes html_viewer to get services from appropriate application

mojo/application/public/cpp/lib/application_impl.cc

Index: mojo/application/public/cpp/lib/application_impl.cc
diff --git a/mojo/application/public/cpp/lib/application_impl.cc b/mojo/application/public/cpp/lib/application_impl.cc
index 7de757f0ce6b1690e55fb603af3d71b0c49f1ff8..bafabe276fbc04eb61da9300ebc3412fbd1577e8 100644
--- a/mojo/application/public/cpp/lib/application_impl.cc
+++ b/mojo/application/public/cpp/lib/application_impl.cc
@@ -35,7 +35,8 @@ ApplicationImpl::ApplicationImpl(ApplicationDelegate* delegate,
       binding_(this, request.Pass()),
       termination_closure_(termination_closure),
       app_lifetime_helper_(this),
-      quit_requested_(false) {
+      quit_requested_(false),
+      weak_factory_(this) {
 }
 
 void ApplicationImpl::ClearConnections() {
@@ -140,7 +141,10 @@ void ApplicationImpl::OnQuitRequested(const Callback<void(bool)>& callback) {
 }
 
 void ApplicationImpl::OnConnectionError() {
+  base::WeakPtr<ApplicationImpl> ptr(weak_factory_.GetWeakPtr());
   QuitNow();
+  if (!ptr)
+    return;
   shell_ = nullptr;
 }