[Payments] Add PaymentRequest checkout funnel UKMs.

chrome/android/java/src/org/chromium/chrome/browser/payments/JourneyLogger.java

Index: chrome/android/java/src/org/chromium/chrome/browser/payments/JourneyLogger.java
diff --git a/components/payments/content/android/java/src/org/chromium/components/payments/JourneyLogger.java b/chrome/android/java/src/org/chromium/chrome/browser/payments/JourneyLogger.java
similarity index 88%
rename from components/payments/content/android/java/src/org/chromium/components/payments/JourneyLogger.java
rename to chrome/android/java/src/org/chromium/chrome/browser/payments/JourneyLogger.java
index d8408df288bc29d5ea078a26353049c72660ebc6..b1857140e964d41b106ed706be585b4d14c8c1a3 100644
--- a/components/payments/content/android/java/src/org/chromium/components/payments/JourneyLogger.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/payments/JourneyLogger.java
@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-package org.chromium.components.payments;
+package org.chromium.chrome.browser.payments;
 
 import org.chromium.base.annotations.JNINamespace;
 
@@ -43,15 +43,22 @@ public class JourneyLogger {
     private static final int MAX_EXPECTED_SAMPLE = 49;
     private static final int NUMBER_BUCKETS = 50;
 
+    // The steps of a successful Payment Request.
+    private static final int STEP_INITIATED = 0;
+    private static final int STEP_SHOWN = 1;
+    private static final int STEP_PAY_CLICKED = 2;
+    private static final int STEP_RECEIVED_INSTRUMENT_DETAILS = 3;
+    private static final int STEP_MAX = 4;
+
     /**
      * Pointer to the native implementation.
      */
     private long mJourneyLoggerAndroid;
 
-    public JourneyLogger(boolean isIncognito) {
+    public JourneyLogger(boolean isIncognito, String url) {
         // Note that this pointer could leak the native object. The called must call destroy() to
         // ensure that the native object is destroyed.
-        mJourneyLoggerAndroid = nativeInitJourneyLoggerAndroid(isIncognito);
+        mJourneyLoggerAndroid = nativeInitJourneyLoggerAndroid(isIncognito, url);
     }
 
     /** Will destroy the native object. This class shouldn't be used afterwards. */
@@ -119,6 +126,14 @@ public class JourneyLogger {
         nativeSetShowCalled(mJourneyLoggerAndroid);
     }
 
+    /**
+     * Records the steps as they are done.
+     */
+    public void setCurrentStep(int step) {
+        assert step < STEP_MAX;
+        nativeSetCurrentStep(mJourneyLoggerAndroid, step);
+    }
+
     /*
      * Records the histograms for all the sections that were requested by the merchant and for the
      * usage of the CanMakePayment method and its effect on the transaction. This method should be
@@ -130,7 +145,7 @@ public class JourneyLogger {
         nativeRecordJourneyStatsHistograms(mJourneyLoggerAndroid, completionStatus);
     }
 
-    private native long nativeInitJourneyLoggerAndroid(boolean isIncognito);
+    private native long nativeInitJourneyLoggerAndroid(boolean isIncognito, String url);
     private native void nativeDestroy(long nativeJourneyLoggerAndroid);
     private native void nativeSetNumberOfSuggestionsShown(
             long nativeJourneyLoggerAndroid, int section, int number);
@@ -141,6 +156,7 @@ public class JourneyLogger {
     private native void nativeSetCanMakePaymentValue(
             long nativeJourneyLoggerAndroid, boolean value);
     private native void nativeSetShowCalled(long nativeJourneyLoggerAndroid);
+    private native void nativeSetCurrentStep(long nativeJourneyLoggerAndroid, int step);
     private native void nativeRecordJourneyStatsHistograms(
             long nativeJourneyLoggerAndroid, int completionStatus);
 }