[Night Light] CL12: String changes and fix frequent requests.

chrome/browser/chromeos/night_light/night_light_client.h

Index: chrome/browser/chromeos/night_light/night_light_client.h
diff --git a/chrome/browser/chromeos/night_light/night_light_client.h b/chrome/browser/chromeos/night_light/night_light_client.h
index 0f8580dfacd3c9e8766fd7e91f84d96ada9a8697..bdb7c4755d60b8d9faa31bf6cecd61aa585f8c9c 100644
--- a/chrome/browser/chromeos/night_light/night_light_client.h
+++ b/chrome/browser/chromeos/night_light/night_light_client.h
@@ -33,8 +33,16 @@ class NightLightClient
   void OnScheduleTypeChanged(
       ash::mojom::NightLightController::ScheduleType new_type) override;
 
+  const base::OneShotTimer& timer() const { return timer_; }
+
+  base::Time last_successful_geo_request_time() const {
+    return last_successful_geo_request_time_;
+  }
+
   bool using_geoposition() const { return using_geoposition_; }
 
+  static base::TimeDelta GetNextRequestDelayAfterSuccessForTesting();
+
   void SetNightLightControllerPtrForTesting(
       ash::mojom::NightLightControllerPtr controller);
 
@@ -46,6 +54,9 @@ class NightLightClient
                      const base::TimeDelta elapsed);
 
  private:
+  // Sends the most recent valid geoposition to NightLightController in ash.
+  void SendCurrentGeoposition();
+
   void ScheduleNextRequest(base::TimeDelta delay);
 
   // Virtual so that it can be overriden by a fake implementation in unit tests
@@ -63,6 +74,11 @@ class NightLightClient
 
   base::OneShotTimer timer_;
 
+  // Last successful geoposition coordinates and its timestamp.
+  base::Time last_successful_geo_request_time_;
+  double latitude_ = 0.0;
+  double longitude_ = 0.0;
+
   // True as long as the schedule type is set to "sunset to sunrise", which
   // means this client will be retrieving the IP-based geoposition once per day.
   bool using_geoposition_ = false;