[UMA, Android, MediaFling] Record the domain and registry of the frame url when casting.

chrome/android/java/src/org/chromium/chrome/browser/media/remote/RecordCastAction.java

Index: chrome/android/java/src/org/chromium/chrome/browser/media/remote/RecordCastAction.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/media/remote/RecordCastAction.java b/chrome/android/java/src/org/chromium/chrome/browser/media/remote/RecordCastAction.java
index ee4cdda79a94f2458551407e9f659e2173e2de7d..dbb4a5fbccd0ea8b34ab63dc6e5bcf3700a25131 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/media/remote/RecordCastAction.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/media/remote/RecordCastAction.java
@@ -7,6 +7,7 @@ package org.chromium.chrome.browser.media.remote;
 import org.chromium.base.annotations.JNINamespace;
 import org.chromium.base.library_loader.LibraryLoader;
 import org.chromium.base.metrics.RecordHistogram;
+import org.chromium.chrome.browser.rappor.RapporServiceBridge;
 
 /**
  * Record statistics on interesting cast events and actions.
@@ -122,6 +123,18 @@ public class RecordCastAction {
         }
     }
 
+    /**
+     * Record the domain and registry of the URL of the frame where the user is casting the video
+     * from using Rappor.
+     *
+     * @param url The frame URL to record the domain and registry of.
+     */
+    public static void castDomainAndRegistry(String url) {
+        if (LibraryLoader.isInitialized()) {
+            RapporServiceBridge.sampleDomainAndRegistryFromURL("Cast.Sender.MediaFrameUrl", url);
+        }
+    }
+
     // Cast sending
     private static native void nativeRecordRemotePlaybackDeviceSelected(int deviceType);
     private static native void nativeRecordCastPlayRequested();