Move //webapk to //chrome/android/webapk

webapk/libs/client/src/org/chromium/webapk/lib/client/WebApkVersionManager.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.client;
-
-import android.content.Context;
-import android.content.SharedPreferences;
-import android.preference.PreferenceManager;
-
-import org.chromium.base.FileUtils;
-import org.chromium.base.ThreadUtils;
-import org.chromium.webapk.lib.common.WebApkUtils;
-
-import java.io.File;
-
-/**
- * Updates installed WebAPKs after a Chrome update.
- */
-public class WebApkVersionManager {
-    /**
-     * Name of the shared preference for the version number of the dynamically loaded dex.
-     */
-    private static final String EXTRACTED_DEX_VERSION_PREF =
-            "web_apk_version_manager_extracted_dex_version";
-
-    private static final String TAG = "WebApkVersionManager";
-
-    /**
-     * If a new WebAPK runtime is available due to a Chrome update, updates the installed WebAPKs.
-     * Should not be called on UI thread.
-     * @param Context context
-     * @param alwaysExtractRuntimeDex Whether the WebAPK runtime should always be re-extracted from
-     * the Chrome APK regardless of whether a new version is available.
-     */
-    public static void updateWebApksIfNeeded(Context context, boolean alwaysExtractRuntimeDex) {
-        assert !ThreadUtils.runningOnUiThread();
-
-        // TODO(pkotwicz|hanxi): Detect whether the manifest of installed APKs needs to be updated.
-        // (crbug.com/604513)
-
-        SharedPreferences preferences =
-                PreferenceManager.getDefaultSharedPreferences(context.getApplicationContext());
-        int extractedDexVersion = preferences.getInt(EXTRACTED_DEX_VERSION_PREF, -1);
-        if (!alwaysExtractRuntimeDex
-                && extractedDexVersion == WebApkVersion.CURRENT_RUNTIME_DEX_VERSION) {
-            return;
-        }
-
-        SharedPreferences.Editor editor = preferences.edit();
-        editor.putInt(EXTRACTED_DEX_VERSION_PREF, WebApkVersion.CURRENT_RUNTIME_DEX_VERSION);
-        editor.apply();
-
-        File dexDir = context.getDir("dex", Context.MODE_PRIVATE);
-        FileUtils.recursivelyDeleteFile(dexDir);
-
-        // Recreate world-executable directory using {@link Context#getDir}.
-        dexDir = context.getDir("dex", Context.MODE_PRIVATE);
-
-        String dexName =
-                WebApkUtils.getRuntimeDexName(WebApkVersion.CURRENT_RUNTIME_DEX_VERSION);
-        File dexFile = new File(dexDir, dexName);
-        if (!FileUtils.extractAsset(context, dexName, dexFile) || !DexOptimizer.optimize(dexFile)) {
-            return;
-        }
-
-        // Make dex file world-readable so that WebAPK can use it.
-        dexFile.setReadable(true, false);
-    }
-}