WebAPKs: Open links which are outside of WebAPK scope in Chrome not in WebAPK

chrome/android/java/src/org/chromium/chrome/browser/webapps/WebApkActivity.java

Index: chrome/android/java/src/org/chromium/chrome/browser/webapps/WebApkActivity.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/webapps/WebApkActivity.java b/chrome/android/java/src/org/chromium/chrome/browser/webapps/WebApkActivity.java
index aa4ac9095989a03f7bb36bdbc84abd2fcc93cb54..47f0fde7b2bfec848d25c42ec8b642d52f2b301c 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/webapps/WebApkActivity.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/webapps/WebApkActivity.java
@@ -9,6 +9,9 @@ import android.content.Intent;
 import org.chromium.base.ContextUtils;
 import org.chromium.chrome.browser.ShortcutHelper;
 import org.chromium.chrome.browser.banners.AppBannerManager;
+import org.chromium.chrome.browser.externalnav.ExternalNavigationDelegateImpl;
+import org.chromium.chrome.browser.externalnav.ExternalNavigationHandler;
+import org.chromium.chrome.browser.tab.InterceptNavigationDelegateImpl;
 import org.chromium.chrome.browser.tab.Tab;
 import org.chromium.chrome.browser.tab.TabDelegateFactory;
 import org.chromium.content_public.browser.LoadUrlParams;
@@ -49,12 +52,21 @@ public class WebApkActivity extends WebappActivity {
     protected TabDelegateFactory createTabDelegateFactory() {
         return new WebappDelegateFactory(this) {
             @Override
+            public InterceptNavigationDelegateImpl createInterceptNavigationDelegate(Tab tab) {
+                String webApkPackage = getWebappInfo().webApkPackageName();
+                ExternalNavigationDelegateImpl externalNavDelegate =
+                        new ExternalNavigationDelegateImpl(tab, webApkPackage);
+                return new InterceptNavigationDelegateImpl(
+                        new ExternalNavigationHandler(externalNavDelegate), tab);
+            }
+
+            @Override
             public AppBannerManager createAppBannerManager(Tab tab) {
                 return null;
             }
         };
     }
-    
+
     public void onStop() {
         super.onStop();
         String packageName = getWebappInfo().webApkPackageName();