Add external data use observer

chrome/android/java/src/org/chromium/chrome/browser/ChromeApplication.java

Index: chrome/android/java/src/org/chromium/chrome/browser/ChromeApplication.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/ChromeApplication.java b/chrome/android/java/src/org/chromium/chrome/browser/ChromeApplication.java
index abd7c69d6bbb46df5b2b59dbf1315cfb1ea49895..7493b68ae37cae032fe84a38a87c59662b4902d9 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/ChromeApplication.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/ChromeApplication.java
@@ -42,6 +42,7 @@ import org.chromium.chrome.browser.accessibility.FontSizePrefs;
 import org.chromium.chrome.browser.banners.AppBannerManager;
 import org.chromium.chrome.browser.banners.AppDetailsDelegate;
 import org.chromium.chrome.browser.customtabs.CustomTabsConnection;
+import org.chromium.chrome.browser.datausage.ExternalDataUseObserver;
 import org.chromium.chrome.browser.document.DocumentActivity;
 import org.chromium.chrome.browser.document.IncognitoDocumentActivity;
 import org.chromium.chrome.browser.download.DownloadManagerService;
@@ -610,6 +611,14 @@ public class ChromeApplication extends ContentApplication {
     }
 
     /**
+     * @return An external observer of data use.
+     * @param nativePtr Pointer to the native ExternalDataUseObserver object.
+     */
+    public ExternalDataUseObserver createExternalDataUseObserver(long nativePtr) {
+        return new ExternalDataUseObserver(nativePtr);
+    }
+
+    /**
      * @return The user agent string of Chrome.
      */
     public static String getBrowserUserAgent() {