Count ImpressionUntilAction using Linear Histogram.

Bug: 1135838
Change-Id: Ie1c0b2e6c866282b5233edf2b8fbe513d7f2d1ce
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2454730Reviewed-by: Xinghui Lu <xinghuilu@chromium.org>
Commit-Queue: Bettina Dea <bdea@chromium.org>
Cr-Commit-Position: refs/heads/master@{#814526}

chrome/android/java/src/org/chromium/chrome/browser/ntp/cards/promo/enhanced_protection/EnhancedProtectionPromoUtils.java

@@ -95,8 +95,9 @@ final class EnhancedProtectionPromoUtils {
             SharedPreferencesManager.getInstance().writeInt(timesSeenKey, timesSeen + 1);
         } else if (action == EnhancedProtectionPromoAction.ACCEPTED) {
             RecordUserAction.record("NewTabPage.Promo.EnhancedProtectionPromo.Accepted");
-            RecordHistogram.recordCountHistogram(
-                    "NewTabPage.Promo.EnhancedProtectionPromo.ImpressionUntilAction", timesSeen);
+            RecordHistogram.recordLinearCountHistogram(
+                    "NewTabPage.Promo.EnhancedProtectionPromo.ImpressionUntilAction", timesSeen, 1,
+                    MAX_IMPRESSION_SEEN, MAX_IMPRESSION_SEEN + 1);
         } else if (action == EnhancedProtectionPromoAction.DISMISSED) {
             RecordUserAction.record("NewTabPage.Promo.EnhancedProtectionPromo.Dismissed");
             RecordHistogram.recordLinearCountHistogram(