[Custom Tabs] Postpone RecordAction until native libray is loaded

chrome/android/java/src/org/chromium/chrome/browser/metrics/LaunchMetrics.java

Index: chrome/android/java/src/org/chromium/chrome/browser/metrics/LaunchMetrics.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/metrics/LaunchMetrics.java b/chrome/android/java/src/org/chromium/chrome/browser/metrics/LaunchMetrics.java
index 87e457bebf7903feaae2711693e3810b91e5d987..a29af93745e6625603822f58e3c545132bf0d48e 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/metrics/LaunchMetrics.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/metrics/LaunchMetrics.java
@@ -8,6 +8,7 @@ import android.util.Pair;
 
 import org.chromium.base.annotations.JNINamespace;
 import org.chromium.base.metrics.RecordHistogram;
+import org.chromium.base.metrics.RecordUserAction;
 import org.chromium.content_public.browser.WebContents;
 
 import java.util.ArrayList;
@@ -43,6 +44,23 @@ public class LaunchMetrics {
         protected abstract void commitAndClear();
     }
 
+    /**
+     * Caches an action that will be recorded after native side is loaded.
+     */
+    public static class ActionEvent extends CachedHistogram {
+        private boolean mNeedsToBeRecorded = true;
+
+        public ActionEvent(String actionName) {
+            super(actionName);
+        }
+
+        @Override
+        protected void commitAndClear() {
+            if (mNeedsToBeRecorded) RecordUserAction.record(mHistogramName);
+            mNeedsToBeRecorded = false;
+        }
+    }
+
     /** Caches whether an event happened. */
     public static class BooleanEvent extends CachedHistogram {
         private boolean mIsHit;