[Autofill] Log the number of profiles considered/removed during dedupe.

components/autofill/core/browser/autofill_metrics.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "components/autofill/core/browser/autofill_metrics.h"
 
 #include <algorithm>
 
 #include "base/logging.h"
 #include "base/metrics/histogram_macros.h"
@@ skipping 576 matching lines @@
 void AutofillMetrics::LogDetermineHeuristicTypesTiming(
     const base::TimeDelta& duration) {
   UMA_HISTOGRAM_TIMES("Autofill.Timing.DetermineHeuristicTypes", duration);
 }
 
 // static
 void AutofillMetrics::LogParseFormTiming(const base::TimeDelta& duration) {
   UMA_HISTOGRAM_TIMES("Autofill.Timing.ParseForm", duration);
 }
 
+// static
+void AutofillMetrics::LogNumberOfProfilesConsideredForDedupe(
+    size_t num_considered) {
+  // A maximum of 50 is enforced to reduce the number of generated buckets.
+  UMA_HISTOGRAM_COUNTS_1000("Autofill.NumberOfProfilesConsideredForDedupe",
+                            std::min(int(num_considered), 50));
+}
+
+// static
+void AutofillMetrics::LogNumberOfProfilesRemovedDuringDedupe(
+    size_t num_removed) {
+  // A maximum of 50 is enforced to reduce the number of generated buckets.
+  UMA_HISTOGRAM_COUNTS_1000("Autofill.NumberOfProfilesRemovedDuringDedupe",
+                            std::min(int(num_removed), 50));
+}
+
 AutofillMetrics::FormEventLogger::FormEventLogger(bool is_for_credit_card)
     : is_for_credit_card_(is_for_credit_card),
       is_server_data_available_(false),
       is_local_data_available_(false),
       has_logged_interacted_(false),
       has_logged_suggestions_shown_(false),
       has_logged_masked_server_card_suggestion_selected_(false),
       has_logged_suggestion_filled_(false),
       has_logged_will_submit_(false),
       has_logged_submitted_(false),
@@ skipping 161 matching lines @@
   else if (is_server_data_available_ && !is_local_data_available_)
     name += ".WithOnlyServerData";
   else if (!is_server_data_available_ && is_local_data_available_)
     name += ".WithOnlyLocalData";
   else
     name += ".WithBothServerAndLocalData";
   LogUMAHistogramEnumeration(name, event, NUM_FORM_EVENTS);
 }
 
 }  // namespace autofill