Upstream: Version WebAPK runtime library

chrome/android/webapk/libs/common/src/org/chromium/webapk/lib/common/WebApkUtils.java

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 package org.chromium.webapk.lib.common;
 
 import android.content.Context;
 import android.content.pm.ApplicationInfo;
 import android.content.pm.PackageManager;
 import android.content.pm.PackageManager.NameNotFoundException;
@@ skipping 40 matching lines @@
                     context.getPackageName(), PackageManager.GET_META_DATA);
             Bundle bundle = ai.metaData;
             hostPackage = bundle.getString("runtimeHost");
         } catch (NameNotFoundException e) {
             e.printStackTrace();
         }
         // Set {@link sHostPackage} to a non-null value so that the value is computed only once.
         sHostPackage = hostPackage != null ? hostPackage : "";
         return sHostPackage;
     }
+
+    /**
+     * Returns name of "Runtime Dex" asset in Chrome APK based on version.
+     * @param version
+     * @return Dex asset name.
+     */
+    public static String getRuntimeDexName(int version) {
+        return "webapk" + version + ".dex";
+    }
 }