Factor stuff from ApplicationImpl out to a new class, ApplicationImplBase.

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

Index: mojo/public/cpp/application/lib/application_runner.cc
diff --git a/mojo/public/cpp/application/lib/application_runner.cc b/mojo/public/cpp/application/lib/application_runner.cc
index 4ef544b71769f61710c710503b43ad3f6406531b..a5c87b7a49041e884a1edfb48811ce84ef2b5ba7 100644
--- a/mojo/public/cpp/application/lib/application_runner.cc
+++ b/mojo/public/cpp/application/lib/application_runner.cc
@@ -6,6 +6,7 @@
 
 #include "mojo/public/cpp/application/application_delegate.h"
 #include "mojo/public/cpp/application/application_impl.h"
+#include "mojo/public/cpp/application/application_impl_base.h"
 #include "mojo/public/cpp/environment/environment.h"
 #include "mojo/public/cpp/environment/logging.h"
 #include "mojo/public/cpp/utility/run_loop.h"
@@ -16,7 +17,7 @@ bool g_running = false;
 }  // namespace
 
 // static
-void ApplicationImpl::Terminate() {
+void ApplicationImplBase::Terminate() {

[vardhan, 2016/05/17 23:36:52]

feels weird that this is defined here.  is there a better way?

(i'm assuming we define it here because it uses ApplicationRunner's "managed"
RunLoop?)

[viettrungluu, 2016/05/17 23:42:50]

Yeah, but it'll require a bunch of work.

   RunLoop::current()->Quit();
 }