Add variations filtering for is_low_end_device.

components/variations/client_filterable_state.h

 // Copyright 2017 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef COMPONENTS_VARIATIONS_CLIENT_FILTERABLE_STATE_H_
 #define COMPONENTS_VARIATIONS_CLIENT_FILTERABLE_STATE_H_
 
 #include "base/macros.h"
 #include "base/time/time.h"
 #include "base/version.h"
@@ skipping 22 matching lines @@
 
   // The hardware form factor that Chrome is running on.
   Study::FormFactor form_factor;
 
   // The OS on which Chrome is running.
   Study::Platform platform;
 
   // The named hardware configuration that Chrome is running on -- used to
   // 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;
 
   // The country code to use for studies configured with permanent consistency.
   std::string permanent_consistency_country;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(ClientFilterableState);
 };
 
 }  // namespace variations
 
 #endif  // COMPONENTS_VARIATIONS_CLIENT_FILTERABLE_STATE_H_