Add a count for Suggested Articles usage.

components/ntp_snippets/content_suggestions_metrics.cc

Index: components/ntp_snippets/content_suggestions_metrics.cc
diff --git a/components/ntp_snippets/content_suggestions_metrics.cc b/components/ntp_snippets/content_suggestions_metrics.cc
index a19fef36e28515a902349a65dc13b4d65e9b6d1c..bfccb3b0dab0d7959817fb5715fd2c40b2698d2f 100644
--- a/components/ntp_snippets/content_suggestions_metrics.cc
+++ b/components/ntp_snippets/content_suggestions_metrics.cc
@@ -9,6 +9,7 @@
 
 #include "base/metrics/histogram.h"
 #include "base/metrics/histogram_macros.h"
+#include "base/metrics/user_metrics.h"
 #include "base/strings/stringprintf.h"
 #include "base/template_util.h"
 
@@ -40,7 +41,7 @@ const char kHistogramDismissedUnvisited[] =
     "NewTabPage.ContentSuggestions.DismissedUnvisited";
 const char kHistogramDismissedVisited[] =
     "NewTabPage.ContentSuggestions.DismissedVisited";
-const char kHistogramUsageTimeLocal[] =
+const char kHistogramArticlesUsageTimeLocal[] =
     "NewTabPage.ContentSuggestions.UsageTimeLocal";
 const char kHistogramVisitDuration[] =
     "NewTabPage.ContentSuggestions.VisitDuration";
@@ -173,9 +174,11 @@ void RecordContentSuggestionsUsage() {
   size_t bucket =
       (now_exploded.hour * 60 + now_exploded.minute) / kBucketSizeMins;
 
-  UMA_HISTOGRAM_ENUMERATION(kHistogramUsageTimeLocal, bucket, kNumBuckets);
+  UMA_HISTOGRAM_ENUMERATION(kHistogramArticlesUsageTimeLocal, bucket,
+                            kNumBuckets);
 
-  LOG(ERROR) << " ****************** Zine Usage";
+  base::RecordAction(
+      base::UserMetricsAction("NewTabPage_ContentSuggestions_ArticlesUsage"));
 }
 
 }  // namespace