[Payments] Use event to log checkout funnel metrics.

components/payments/core/journey_logger.cc

 // Copyright 2017 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/payments/core/journey_logger.h"
 
 #include <algorithm>
 
 #include "base/metrics/histogram_functions.h"
 #include "base/metrics/histogram_macros.h"
@@ skipping 98 matching lines @@
 
 void JourneyLogger::SetEventOccurred(Event event) {
   events_ |= event;
 }
 
 void JourneyLogger::RecordJourneyStatsHistograms(
     CompletionStatus completion_status) {
   DCHECK(!has_recorded_);
   has_recorded_ = true;
 
+  RecordCheckoutFlowMetrics();
+
   RecordSectionSpecificStats(completion_status);
 
   // Record the CanMakePayment metrics based on whether the transaction was
   // completed or aborted by the user (UserAborted) or otherwise (OtherAborted).
   RecordCanMakePaymentStats(completion_status);
 
   RecordUrlKeyedMetrics(completion_status);
 }
 
+void JourneyLogger::RecordCheckoutFlowMetrics() {
+  UMA_HISTOGRAM_BOOLEAN("PaymentRequest.CheckoutFunnel.Initiated", true);
+
+  if (events_ & EVENT_SHOWN)
+    UMA_HISTOGRAM_BOOLEAN("PaymentRequest.CheckoutFunnel.Shown", true);
+
+  if (events_ & EVENT_PAY_CLICKED)
+    UMA_HISTOGRAM_BOOLEAN("PaymentRequest.CheckoutFunnel.PayClicked", true);
+
+  if (events_ & EVENT_RECEIVED_INSTRUMENT_DETAILS)
+    UMA_HISTOGRAM_BOOLEAN(
+        "PaymentRequest.CheckoutFunnel.ReceivedInstrumentDetails", true);
+
+  if (events_ & EVENT_SKIPPED_SHOW)
+    UMA_HISTOGRAM_BOOLEAN("PaymentRequest.CheckoutFunnel.SkippedShow", true);
+}
+
 void JourneyLogger::RecordSectionSpecificStats(
     CompletionStatus completion_status) {
   // Record whether the user had suggestions for each requested information.
   bool user_had_all_requested_information = true;
 
   for (int i = 0; i < NUMBER_OF_SECTIONS; ++i) {
     std::string name_suffix = GetHistogramNameSuffix(i, completion_status);
 
     // Only log the metrics for a section if it was requested by the merchant.
     if (sections_[i].is_requested_) {
@@ skipping 93 matching lines @@
   int32_t source_id = ukm_service_->GetNewSourceID();
   ukm_service_->UpdateSourceURL(source_id, url_);
   std::unique_ptr<ukm::UkmEntryBuilder> builder = ukm_service_->GetEntryBuilder(
       source_id, internal::kUKMCheckoutEventsEntryName);
   builder->AddMetric(internal::kUKMCompletionStatusMetricName,
                      completion_status);
   builder->AddMetric(internal::kUKMEventsMetricName, events_);
 }
 
 }  // namespace payments