Stop showing release notes suggestion chip when clicked

Previous behavior: Clicking the suggestion chip launches the app but the
chip stays there.
This CL: In addition to launching the app, it stops the suggestion chip
from appearing.

Note: Does not fix the issue of the chip not disappearing after being
viewed three times.

Bug: b/169711884
Change-Id: I5760b66c1a086d770728bb1c720806de0333a850
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2440328
Commit-Queue: Zufeng Wang <zufeng@google.com>
Reviewed-by: Nancy Wang <nancylingwang@chromium.org>
Reviewed-by: Xiyuan Xia <xiyuan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#813079}

chrome/browser/chromeos/release_notes/release_notes_storage.cc

@@ -111,4 +111,9 @@ void ReleaseNotesStorage::DecreaseTimesLeftToShowSuggestionChip() {
       times_left_to_show - 1);
 }
 
+void ReleaseNotesStorage::StopShowingSuggestionChip() {
+  profile_->GetPrefs()->SetInteger(
+      prefs::kReleaseNotesSuggestionChipTimesLeftToShow, 0);
+}
+
 }  // namespace chromeos

chrome/browser/chromeos/release_notes/release_notes_storage.h

@@ -35,6 +35,9 @@ class ReleaseNotesStorage {
   // Decreases the amount of times left to show the suggestion chip.
   void DecreaseTimesLeftToShowSuggestionChip();
 
+  // Sets the number of times left to show the suggestion chip to 0.
+  void StopShowingSuggestionChip();
+
  private:
   Profile* const profile_;
 

chrome/browser/ui/app_list/search/app_service_app_result.cc

@@ -172,6 +172,7 @@ void AppServiceAppResult::Launch(int event_flags,
         base::UserMetricsAction("ReleaseNotes.SuggestionChipLaunched"));
     proxy->LaunchAppWithUrl(app_id(), event_flags, query_url().value(),
                             launch_source, controller()->GetAppListDisplayId());
+    chromeos::ReleaseNotesStorage(profile()).StopShowingSuggestionChip();
     return;
   }