Disable app shutdown logic for now while I fix the network_service apptests.

BUG=484234
TBR=msw@chromium.org

Review URL: https://codereview.chromium.org/1148613004

Cr-Commit-Position: refs/heads/master@{#330606}

mojo/application/app_lifetime_helper.cc

@@ -81,8 +81,10 @@ void AppLifetimeHelper::AddRef() {
 }
 
 void AppLifetimeHelper::Release() {
-  if (!--ref_count_)
-    ApplicationImpl::Terminate();
+  if (!--ref_count_) {
+    // Disabled until network_service tests pass again http://crbug.com/484234
+    //ApplicationImpl::Terminate();
+  }
 }
 
 }  // namespace mojo