[Payments] Add PaymentRequest checkout funnel UKMs.

chrome/browser/android/chrome_jni_registrar.cc

Index: chrome/browser/android/chrome_jni_registrar.cc
diff --git a/chrome/browser/android/chrome_jni_registrar.cc b/chrome/browser/android/chrome_jni_registrar.cc
index a339bf73fef3207767d7ba71d3aa87760a44da4b..6e727627d3135bd81a054ed682217c158b7338cd 100644
--- a/chrome/browser/android/chrome_jni_registrar.cc
+++ b/chrome/browser/android/chrome_jni_registrar.cc
@@ -129,6 +129,7 @@
 #include "chrome/browser/notifications/notification_platform_bridge_android.h"
 #include "chrome/browser/password_manager/account_chooser_dialog_android.h"
 #include "chrome/browser/password_manager/auto_signin_first_run_dialog_android.h"
+#include "chrome/browser/payments/android/journey_logger_android.h"
 #include "chrome/browser/permissions/permission_dialog_delegate.h"
 #include "chrome/browser/permissions/permission_update_infobar_delegate_android.h"
 #include "chrome/browser/predictors/resource_prefetch_predictor_android.h"
@@ -329,6 +330,7 @@ static base::android::RegistrationMethod kChromeRegisteredMethods[] = {
     {"ShortcutHelper", ShortcutHelper::RegisterShortcutHelper},
     {"JavascriptAppModalDialog",
      JavascriptAppModalDialogAndroid::RegisterJavascriptAppModalDialog},
+    {"JourneyLoggerAndroid", payments::JourneyLoggerAndroid::Register},

[Mathieu, 2017/04/10 01:03:01]

Can you use the approach on line 228 of declaring a general ChromePayments thing
instead? 

{"ChromePayments", payments::android::RegisterChromePayments},

The approach in
https://cs.chromium.org/chromium/src/components/payments/content/android/comp...
is much better if we ever need to add different implementations.

[sebsg, 2017/04/10 15:30:28]

Done.

     {"LargeIconBridge", LargeIconBridge::RegisterLargeIconBridge},
     {"LaunchMetrics", metrics::RegisterLaunchMetrics},
     {"LayerTitleCache", RegisterLayerTitleCache},