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

chrome/browser/chromeos/chrome_browser_main_chromeos.cc

Index: chrome/browser/chromeos/chrome_browser_main_chromeos.cc
diff --git a/chrome/browser/chromeos/chrome_browser_main_chromeos.cc b/chrome/browser/chromeos/chrome_browser_main_chromeos.cc
index 320ce28ef6a12f8847d5d7af3d8b760e8bf247f3..a43a3f7024829f3f38282e8707314080e9f510cb 100644
--- a/chrome/browser/chromeos/chrome_browser_main_chromeos.cc
+++ b/chrome/browser/chromeos/chrome_browser_main_chromeos.cc
@@ -993,7 +993,7 @@ void ChromeBrowserMainPartsChromeos::PostBrowserStart() {
   if (!base::CommandLine::ForCurrentProcess()->HasSwitch(
           ash::switches::kAshDisableNightLight)) {
     night_light_client_ = base::MakeUnique<NightLightClient>(
-        g_browser_process->system_request_context());
+        g_browser_process->system_request_context(), nullptr, nullptr);

[stevenjb, 2017/07/01 00:31:26]

Comment these, e.g. nullptr /* no TickClock override */

[afakhry, 2017/07/01 00:57:45]

Not needed anymore.

     night_light_client_->Start();
   }