[On-device adaptive brightness] Reduce log message from Adapter

Bug: 881215,1094935
Change-Id: I9739565f89daa164e0054126d4eb270a3bdb967f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2262095Reviewed-by: Thanh Nguyen <thanhdng@chromium.org>
Commit-Queue: Jia Meng <jiameng@chromium.org>
Cr-Commit-Position: refs/heads/master@{#781718}

chrome/browser/chromeos/power/auto_screen_brightness/adapter.cc

@@ -122,7 +122,10 @@ void Adapter::OnAmbientLightUpdated(int lux) {
 
   // We do not record ALS value if lid is closed.
   if (*is_lid_closed_) {
-    VLOG(1) << "ABAdapter ALS ignored while lid-closed";
+    if (!lid_closed_message_reported_) {
+      VLOG(1) << "ABAdapter ALS ignored while lid-closed";
+      lid_closed_message_reported_ = true;
+    }
     return;
   }
 
@@ -308,6 +311,7 @@ void Adapter::LidEventReceived(chromeos::PowerManagerClient::LidState state,
   is_lid_closed_ = state == chromeos::PowerManagerClient::LidState::CLOSED;
   if (!*is_lid_closed_) {
     lid_reopen_time_ = tick_clock_->NowTicks();
+    lid_closed_message_reported_ = false;
     VLOG(1) << "ABAdapter Adapter received lid-reopened event";
     return;
   }

chrome/browser/chromeos/power/auto_screen_brightness/adapter.h

@@ -392,6 +392,10 @@ class Adapter : public AlsReader::Observer,
   // has no lid, it is considered as open.
   base::Optional<bool> is_lid_closed_;
 
+  // Ignored ALS due to closed lid is only recorded once: the 1st time when
+  // ALS changes.
+  bool lid_closed_message_reported_ = false;
+
   // Recent lid reopen time following a lid-closed event. Unset after the first
   // brightness change after a recent lid-open event.
   base::TimeTicks lid_reopen_time_;