[Payments] add uma metric to record cases that service worker timesout.

Bug: 927793
Change-Id: I57ca3806130a93cc244a75fd0af2dfb6066039b0
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1690394Reviewed-by: Rouslan Solomakhin <rouslan@chromium.org>
Reviewed-by: Robert Kaplow <rkaplow@chromium.org>
Reviewed-by: Sahel Sharify <sahel@chromium.org>
Commit-Queue: Sahel Sharify <sahel@chromium.org>
Cr-Commit-Position: refs/heads/master@{#676045}

content/browser/payments/payment_app_provider_impl.cc

@@ -12,6 +12,7 @@
 #include "base/base64.h"
 #include "base/bind.h"
 #include "base/bind_helpers.h"
+#include "base/metrics/histogram_macros.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_util.h"
 #include "base/task/post_task.h"
@@ -206,6 +207,8 @@ class RespondWithCallbacks
     } else if (service_worker_status ==
                blink::ServiceWorkerStatusCode::kErrorTimeout) {
       response_type = PaymentEventResponseType::PAYMENT_EVENT_TIMEOUT;
+      UMA_HISTOGRAM_BOOLEAN("PaymentRequest.ServiceWorkerStatusCodeTimeout",
+                            true);
     }
 
     RespondWithErrorAndDeleteSelf(response_type);

tools/metrics/histograms/histograms.xml

@@ -95345,6 +95345,11 @@ uploading your change for review.
   </summary>
 </histogram>
 
+<histogram name="PaymentRequest.ServiceWorkerStatusCodeTimeout" enum="Boolean">
+  <owner>sahel@chromium.org</owner>
+  <summary>True when a service worker times out 5 mins after request.</summary>
+</histogram>
+
 <histogram
     name="PaymentRequest.UserDidNotHaveCompleteSuggestionsForEverything.EffectOnCompletion"
     enum="PaymentRequestFlowCompletionStatus">