[Web Payment] Measure usage of standardized payment methods.

This patch adds a use counter for the number of times that a user
invokes a payment handler with a standardized payment method identifier,
such as "basic-card" or "tokenized-card", as distinct from URL-based
payment method identifiers, such as "https://bobpay.xyz".

Chrome status: https://chromestatus.com/feature/5717324021628928
Blink intent to deprecate and remove:
https://groups.google.com/a/chromium.org/g/blink-dev/c/ZS0JxjApEhI/m/GP1_t04gBAAJ

Bug: 1159510
Change-Id: I4082ddfee7dcf293d57cb1847a526192419ff0eb
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2595617
Commit-Queue: Rouslan Solomakhin <rouslan@chromium.org>
Reviewed-by: Marijn Kruisselbrink <mek@chromium.org>
Reviewed-by: Liquan (Max) Gu <maxlg@chromium.org>
Cr-Commit-Position: refs/heads/master@{#842013}

third_party/blink/public/mojom/web_feature/web_feature.mojom

@@ -3068,6 +3068,7 @@ enum WebFeature {
   kSamePartyCookieExclusionOverruledSameSite = 3747,
   kSamePartyCookieInclusionOverruledSameSite = 3748,
   kEmbedElementWithoutTypeSrcChanged = 3749,
+  kPaymentHandlerStandardizedPaymentMethodIdentifier = 3750,
 
   // Add new features immediately above this line. Don't change assigned
   // numbers of any item, and don't reuse removed slots.

third_party/blink/renderer/modules/service_worker/service_worker_global_scope.cc

@@ -30,6 +30,7 @@
 
 #include "third_party/blink/renderer/modules/service_worker/service_worker_global_scope.h"
 
+#include <algorithm>
 #include <memory>
 #include <utility>
 
@@ -47,6 +48,7 @@
 #include "third_party/blink/public/mojom/appcache/appcache.mojom-blink.h"
 #include "third_party/blink/public/mojom/fetch/fetch_api_request.mojom-blink.h"
 #include "third_party/blink/public/mojom/timing/worker_timing_container.mojom-blink.h"
+#include "third_party/blink/public/mojom/web_feature/web_feature.mojom-blink.h"
 #include "third_party/blink/public/mojom/worker/subresource_loader_updater.mojom.h"
 #include "third_party/blink/public/platform/modules/service_worker/web_service_worker_error.h"
 #include "third_party/blink/public/platform/modules/service_worker/web_service_worker_fetch_context.h"
@@ -2406,6 +2408,18 @@ void ServiceWorkerGlobalScope::StartPaymentRequestEvent(
         event_data->payment_options->request_shipping);
   }
 
+  // Count standardized payment method identifiers, such as "basic-card" or
+  // "tokenized-card". Omit counting the URL-based payment method identifiers,
+  // such as "https://bobpay.xyz".
+  if (std::any_of(
+          event_data->method_data.begin(), event_data->method_data.end(),
+          [](const payments::mojom::blink::PaymentMethodDataPtr& datum) {
+            return datum && !datum->supported_method.StartsWith("http");
+          })) {
+    UseCounter::Count(
+        this, WebFeature::kPaymentHandlerStandardizedPaymentMethodIdentifier);
+  }
+
   mojo::PendingRemote<payments::mojom::blink::PaymentHandlerHost>
       payment_handler_host = std::move(event_data->payment_handler_host);
   Event* event = PaymentRequestEvent::Create(
@@ -2413,8 +2427,7 @@ void ServiceWorkerGlobalScope::StartPaymentRequestEvent(
       PaymentEventDataConversion::ToPaymentRequestEventInit(
           ScriptController()->GetScriptState(), std::move(event_data)),
       std::move(payment_handler_host), respond_with_observer,
-      wait_until_observer,
-      ExecutionContext::From(ScriptController()->GetScriptState()));
+      wait_until_observer, this);
 
   DispatchExtendableEventWithRespondWith(event, wait_until_observer,
                                          respond_with_observer);

tools/metrics/histograms/enums.xml

@@ -30823,6 +30823,7 @@ Called by update_use_counter_feature_enum.py.-->
   <int value="3747" label="SamePartyCookieExclusionOverruledSameSite"/>
   <int value="3748" label="SamePartyCookieInclusionOverruledSameSite"/>
   <int value="3749" label="EmbedElementWithoutTypeSrcChanged"/>
+  <int value="3750" label="PaymentHandlerStandardizedPaymentMethodIdentifier"/>
 </enum>
 
 <enum name="FeaturePolicyAllowlistType">