[CrOS Tether] Create HostScanCache, which caches scan results and inserts them into the network sta…

chromeos/components/tether/mock_tether_host_response_recorder.h

Index: chromeos/components/tether/mock_tether_host_response_recorder.h
diff --git a/chromeos/components/tether/mock_tether_host_response_recorder.h b/chromeos/components/tether/mock_tether_host_response_recorder.h
index 1293a1e649628c55db967ce61f0220bc9af18ce1..6ab0965a9935e3fb75cd2d4ae9bbfcddef5a8789 100644
--- a/chromeos/components/tether/mock_tether_host_response_recorder.h
+++ b/chromeos/components/tether/mock_tether_host_response_recorder.h
@@ -22,6 +22,8 @@ class MockTetherHostResponseRecorder : public TetherHostResponseRecorder {
   MockTetherHostResponseRecorder();
   ~MockTetherHostResponseRecorder() override;
 
+  void NotifyPreviouslyConnectedHostIdsChanged();

[stevenjb, 2017/05/01 18:26:11]

It is unconventional for mocks to have methods. Instead make use of WillOnce,
etc in tests.

[Kyle Horimoto, 2017/05/01 21:14:43]

Done.

+
   MOCK_METHOD1(RecordSuccessfulTetherAvailabilityResponse,
                void(const cryptauth::RemoteDevice&));
   MOCK_METHOD1(RecordSuccessfulConnectTetheringResponse,