Changes html_viewer to get services from appropriate application

mojo/application/public/cpp/application_impl.h

Index: mojo/application/public/cpp/application_impl.h
diff --git a/mojo/application/public/cpp/application_impl.h b/mojo/application/public/cpp/application_impl.h
index 272f17b8f874694e085352c3355d3699bbe364cd..7036d33dbc6b72beff66800258d101ca20a093db 100644
--- a/mojo/application/public/cpp/application_impl.h
+++ b/mojo/application/public/cpp/application_impl.h
@@ -8,6 +8,7 @@
 #include <vector>
 
 #include "base/callback.h"
+#include "base/memory/weak_ptr.h"
 #include "mojo/application/public/cpp/app_lifetime_helper.h"
 #include "mojo/application/public/cpp/application_connection.h"
 #include "mojo/application/public/cpp/application_delegate.h"
@@ -133,6 +134,7 @@ class ApplicationImpl : public Application,
   base::Closure termination_closure_;
   AppLifetimeHelper app_lifetime_helper_;
   bool quit_requested_;
+  base::WeakPtrFactory<ApplicationImpl> weak_factory_;
 
   MOJO_DISALLOW_COPY_AND_ASSIGN(ApplicationImpl);
 };