Revert of ApplicationImpl cleanup, part 1:

device/devices_app/devices_app.cc

Index: device/devices_app/devices_app.cc
diff --git a/device/devices_app/devices_app.cc b/device/devices_app/devices_app.cc
index 4501f75540bacc2ddf64824d21fbf8acd2e80c2d..1f49170e8991523152136a30894a930231f03574 100644
--- a/device/devices_app/devices_app.cc
+++ b/device/devices_app/devices_app.cc
@@ -156,7 +156,7 @@
   // Passing unretained |app_impl_| is safe here because |app_impl_| is
   // guaranteed to outlive |this|, and the callback is canceled if |this| is
   // destroyed.
-  idle_timeout_callback_.Reset(base::Bind(&mojo::ApplicationImpl::Quit,
+  idle_timeout_callback_.Reset(base::Bind(&mojo::ApplicationImpl::Terminate,
                                           base::Unretained(app_impl_)));
   base::ThreadTaskRunnerHandle::Get()->PostDelayedTask(
       FROM_HERE, idle_timeout_callback_.callback(),