Add variations filtering for is_low_end_device.

components/variations/client_filterable_state.h

Index: components/variations/client_filterable_state.h
diff --git a/components/variations/client_filterable_state.h b/components/variations/client_filterable_state.h
index c2671f37da31e0bab649adeb8fd83f78334b6aec..5f0566cbca49c306d1b83a30daebc9607eaac894 100644
--- a/components/variations/client_filterable_state.h
+++ b/components/variations/client_filterable_state.h
@@ -41,6 +41,9 @@ struct ClientFilterableState {
   // identify models of devices.
   std::string hardware_class;
 

[rkaplow, 2017/07/06 17:49:49]

can you link to the definition of this somewhere? I feel some docs are helpful
since the definition of a low end device which change from year to year

[Alexei Svitkine (slow), 2017/07/11 15:08:14]

Done.

Mentioned base::SysInfo::IsLowEndDevice() where this comes from. The docs for
that have details.

+  // Whether this is a low-end device. Currently only supported on Android.
+  bool is_low_end_device = false;
+
   // The country code to use for studies configured with session consistency.
   std::string session_consistency_country;