Implement Android key/value backup

chrome/android/java_sources.gni

 # 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.
 
 chrome_java_sources = [
   "java/src/com/google/android/apps/chrome/appwidget/bookmarks/BookmarkThumbnailWidgetProvider.java",
   "java/src/org/chromium/chrome/browser/ActivityTabTaskDescriptionHelper.java",
   "java/src/org/chromium/chrome/browser/ActivityTaskDescriptionIconGenerator.java",
   "java/src/org/chromium/chrome/browser/AfterStartupTaskUtils.java",
   "java/src/org/chromium/chrome/browser/ApplicationInitialization.java",
   "java/src/org/chromium/chrome/browser/ApplicationLifetime.java",
   "java/src/org/chromium/chrome/browser/AssistStatusHandler.java",
   "java/src/org/chromium/chrome/browser/BackgroundSyncLauncher.java",
   "java/src/org/chromium/chrome/browser/BasicNativePage.java",
   "java/src/org/chromium/chrome/browser/BluetoothChooserDialog.java",
   "java/src/org/chromium/chrome/browser/BrowserRestartActivity.java",
   "java/src/org/chromium/chrome/browser/ChromeActionModeCallback.java",
   "java/src/org/chromium/chrome/browser/ChromeActivity.java",
   "java/src/org/chromium/chrome/browser/ChromeActivitySessionTracker.java",
   "java/src/org/chromium/chrome/browser/ChromeApplication.java",
   "java/src/org/chromium/chrome/browser/ChromeBackgroundService.java",
   "java/src/org/chromium/chrome/browser/ChromeBackgroundServiceWaiter.java",
   "java/src/org/chromium/chrome/browser/ChromeBackupAgent.java",
+  "java/src/org/chromium/chrome/browser/ChromeBackupWatcher.java",
   "java/src/org/chromium/chrome/browser/ChromeFeatureList.java",
   "java/src/org/chromium/chrome/browser/ChromeHttpAuthHandler.java",
   "java/src/org/chromium/chrome/browser/ChromeStrictMode.java",
   "java/src/org/chromium/chrome/browser/ChromeSwitches.java",
   "java/src/org/chromium/chrome/browser/ChromeTabbedActivity.java",
   "java/src/org/chromium/chrome/browser/ChromeTabbedActivity2.java",
   "java/src/org/chromium/chrome/browser/ChromeVersionInfo.java",
   "java/src/org/chromium/chrome/browser/ChromeWindow.java",
   "java/src/org/chromium/chrome/browser/DeferredStartupHandler.java",
   "java/src/org/chromium/chrome/browser/DevToolsServer.java",
@@ skipping 1091 matching lines @@
   "javatests/src/org/chromium/base/test/util/parameter/ParameterizedTestClassAnnotationParametersTest.java",
   "javatests/src/org/chromium/base/test/util/parameter/ParameterizedTestClassAnnotationParametersTestSetInheritanceTest.java",
   "javatests/src/org/chromium/base/test/util/parameter/ParameterizedTestClassAnnotationParametersTestSetTest.java",
   "javatests/src/org/chromium/base/test/util/parameter/ParameterizedTestClassAnnotationTest.java",
   "javatests/src/org/chromium/chrome/browser/AudioTest.java",
   "javatests/src/org/chromium/chrome/browser/BackgroundSyncLauncherTest.java",
   "javatests/src/org/chromium/chrome/browser/BindingManagerIntegrationTest.java",
   "javatests/src/org/chromium/chrome/browser/BluetoothChooserDialogTest.java",
   "javatests/src/org/chromium/chrome/browser/ChromeActivityTest.java",
   "javatests/src/org/chromium/chrome/browser/ChromeBackgroundServiceTest.java",
-  "javatests/src/org/chromium/chrome/browser/ChromeBackupIntegrationTest.java",
   "javatests/src/org/chromium/chrome/browser/ContentViewFocusTest.java",
   "javatests/src/org/chromium/chrome/browser/CrashTest.java",
   "javatests/src/org/chromium/chrome/browser/FocusedEditableTextFieldZoomTest.java",
   "javatests/src/org/chromium/chrome/browser/HistoryUITest.java",
   "javatests/src/org/chromium/chrome/browser/IntentHandlerTest.java",
   "javatests/src/org/chromium/chrome/browser/ItemChooserDialogTest.java",
   "javatests/src/org/chromium/chrome/browser/JavaScriptEvalChromeTest.java",
   "javatests/src/org/chromium/chrome/browser/MainActivityWithURLTest.java",
   "javatests/src/org/chromium/chrome/browser/ModalDialogTest.java",
   "javatests/src/org/chromium/chrome/browser/NavigateTest.java",
@@ skipping 366 matching lines @@
   "sync_shell/javatests/src/org/chromium/chrome/browser/sync/SyncTestBase.java",
   "sync_shell/javatests/src/org/chromium/chrome/browser/sync/TypedUrlsTest.java",
   "sync_shell/javatests/src/org/chromium/chrome/browser/sync/ui/PassphraseTypeDialogFragmentTest.java",
 ]
 
 # Only used for testing, should not be shipped to end users.
 if (!is_official_build) {
   chrome_java_sources += [ "java/src/org/chromium/chrome/browser/offlinepages/evaluation/OfflinePageEvaluationBridge.java" ]
   chrome_test_java_sources += [ "javatests/src/org/chromium/chrome/browser/offlinepages/OfflinePageSavePageLaterEvaluationTest.java" ]
 }