Clean up document-mode specific UI.

chrome/android/java/src/org/chromium/chrome/browser/externalnav/ExternalNavigationDelegateImpl.java

Index: chrome/android/java/src/org/chromium/chrome/browser/externalnav/ExternalNavigationDelegateImpl.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/externalnav/ExternalNavigationDelegateImpl.java b/chrome/android/java/src/org/chromium/chrome/browser/externalnav/ExternalNavigationDelegateImpl.java
index 0269372a91fe45d29b372fdb1dc5b7bfda8af30a..fb6ea7ddf8807fdf98e7cb5fb9e4b5c465ee505b 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/externalnav/ExternalNavigationDelegateImpl.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/externalnav/ExternalNavigationDelegateImpl.java
@@ -40,7 +40,6 @@ import org.chromium.chrome.browser.IntentHandler;
 import org.chromium.chrome.browser.document.ChromeLauncherActivity;
 import org.chromium.chrome.browser.externalnav.ExternalNavigationHandler.OverrideUrlLoadingResult;
 import org.chromium.chrome.browser.tab.Tab;
-import org.chromium.chrome.browser.util.FeatureUtilities;
 import org.chromium.chrome.browser.util.UrlUtilities;
 import org.chromium.content_public.browser.LoadUrlParams;
 import org.chromium.content_public.common.Referrer;
@@ -248,7 +247,7 @@ public class ExternalNavigationDelegateImpl implements ExternalNavigationDelegat
     @VisibleForTesting
     static ArrayList<String> getSpecializedHandlersWithFilter(
             List<ResolveInfo> infos, String filterPackageName) {
-        ArrayList<String> result = new ArrayList<String>();
+        ArrayList<String> result = new ArrayList<>();
         if (infos == null) {
             return result;
         }
@@ -501,11 +500,6 @@ public class ExternalNavigationDelegateImpl implements ExternalNavigationDelegat
     }
 
     @Override
-    public boolean isDocumentMode() {
-        return FeatureUtilities.isDocumentMode(mApplicationContext);
-    }
-
-    @Override
     public String getDefaultSmsPackageName() {
         if (Build.VERSION.SDK_INT < Build.VERSION_CODES.KITKAT) return null;
         return Telephony.Sms.getDefaultSmsPackage(mApplicationContext);