Add UMA for the content suggestions settings

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 939 matching lines @@
   "java/src/org/chromium/chrome/browser/snackbar/DataReductionPromoSnackbarController.java",
   "java/src/org/chromium/chrome/browser/snackbar/DataUseSnackbarController.java",
   "java/src/org/chromium/chrome/browser/snackbar/Snackbar.java",
   "java/src/org/chromium/chrome/browser/snackbar/SnackbarCollection.java",
   "java/src/org/chromium/chrome/browser/snackbar/SnackbarManager.java",
   "java/src/org/chromium/chrome/browser/snackbar/SnackbarView.java",
   "java/src/org/chromium/chrome/browser/snackbar/TemplatePreservingTextView.java",
   "java/src/org/chromium/chrome/browser/snackbar/smartlockautosignin/AutoSigninSnackbarController.java",
   "java/src/org/chromium/chrome/browser/snackbar/undo/UndoBarController.java",
   "java/src/org/chromium/chrome/browser/ssl/SecurityStateModel.java",
+  "java/src/org/chromium/chrome/browser/suggestions/ContentSuggestionsUma.java",
   "java/src/org/chromium/chrome/browser/suggestions/DestructionObserver.java",
   "java/src/org/chromium/chrome/browser/suggestions/MostVisitedSites.java",
   "java/src/org/chromium/chrome/browser/suggestions/MostVisitedSitesBridge.java",
   "java/src/org/chromium/chrome/browser/suggestions/SuggestionsBottomSheetContent.java",
   "java/src/org/chromium/chrome/browser/suggestions/Tile.java",
   "java/src/org/chromium/chrome/browser/suggestions/TileGrid.java",
   "java/src/org/chromium/chrome/browser/suggestions/TileGridLayout.java",
   "java/src/org/chromium/chrome/browser/suggestions/OfflinableSuggestion.java",
   "java/src/org/chromium/chrome/browser/suggestions/SuggestionsOfflineModelObserver.java",
   "java/src/org/chromium/chrome/browser/suggestions/TileGroup.java",
@@ skipping 701 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" ]
 }