Add app indexing reporter public class.

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",
@@ skipping 393 matching lines @@
   "java/src/org/chromium/chrome/browser/history/BrowsingHistoryBridge.java",
   "java/src/org/chromium/chrome/browser/history/HistoryActivity.java",
   "java/src/org/chromium/chrome/browser/history/HistoryAdapter.java",
   "java/src/org/chromium/chrome/browser/history/HistoryPage.java",
   "java/src/org/chromium/chrome/browser/history/HistoryItem.java",
   "java/src/org/chromium/chrome/browser/history/HistoryItemView.java",
   "java/src/org/chromium/chrome/browser/history/HistoryManager.java",
   "java/src/org/chromium/chrome/browser/history/HistoryManagerToolbar.java",
   "java/src/org/chromium/chrome/browser/history/HistoryManagerUtils.java",
   "java/src/org/chromium/chrome/browser/history/HistoryProvider.java",
+  "java/src/org/chromium/chrome/browser/historyreport/AppIndexingReporter.java",
   "java/src/org/chromium/chrome/browser/historyreport/DeltaFileEntry.java",
   "java/src/org/chromium/chrome/browser/historyreport/HistoryReportJniBridge.java",
   "java/src/org/chromium/chrome/browser/historyreport/SearchJniBridge.java",
   "java/src/org/chromium/chrome/browser/historyreport/UsageReport.java",
   "java/src/org/chromium/chrome/browser/identity/SettingsSecureBasedIdentificationGenerator.java",
   "java/src/org/chromium/chrome/browser/identity/UniqueIdentificationGenerator.java",
   "java/src/org/chromium/chrome/browser/identity/UniqueIdentificationGeneratorFactory.java",
   "java/src/org/chromium/chrome/browser/identity/UuidBasedUniqueIdentificationGenerator.java",
   "java/src/org/chromium/chrome/browser/incognito/IncognitoNotificationManager.java",
   "java/src/org/chromium/chrome/browser/incognito/IncognitoNotificationService.java",
@@ skipping 1135 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" ]
 }