[CrOS Tether] Sort Tether network lists.

chromeos/components/tether/host_scan_device_prioritizer.h

Index: chromeos/components/tether/host_scan_device_prioritizer.h
diff --git a/chromeos/components/tether/host_scan_device_prioritizer.h b/chromeos/components/tether/host_scan_device_prioritizer.h
index 43997e45572793765463c0f219f7dff873b5a5fa..eedcb6416197f48d0c47ad0aba6624b501dd65af 100644
--- a/chromeos/components/tether/host_scan_device_prioritizer.h
+++ b/chromeos/components/tether/host_scan_device_prioritizer.h
@@ -12,8 +12,6 @@ namespace chromeos {
 
 namespace tether {
 
-class TetherHostResponseRecorder;
-
 // Prioritizes the order of devices when performing a host scan. To optimize for
 // the most common tethering operations, this class uses the following rules:
 //   * The device which has most recently sent a successful
@@ -24,17 +22,14 @@ class TetherHostResponseRecorder;
 //   * All other devices are left in the order they are passed.
 class HostScanDevicePrioritizer {
  public:
-  HostScanDevicePrioritizer(
-      TetherHostResponseRecorder* tether_host_response_recorder);
-  virtual ~HostScanDevicePrioritizer();
+  HostScanDevicePrioritizer() {}
+  virtual ~HostScanDevicePrioritizer() {}
 
   // Prioritizes |remote_devices| using the rules described above.
   virtual void SortByHostScanOrder(
-      std::vector<cryptauth::RemoteDevice>* remote_devices) const;
+      std::vector<cryptauth::RemoteDevice>* remote_devices) const = 0;
 
  private:
-  TetherHostResponseRecorder* tether_host_response_recorder_;
-
   DISALLOW_COPY_AND_ASSIGN(HostScanDevicePrioritizer);
 };