[NTP Snippets] Refactor background scheduling for remote suggestions

components/ntp_snippets/BUILD.gn

 # Copyright 2014 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.
 
 import("//build/config/ui.gni")
 
 if (is_android) {
   import("//build/config/android/config.gni")
   import("//build/config/android/rules.gni")
 }
@@ skipping 30 matching lines @@
     "physical_web_pages/physical_web_page_suggestions_provider.cc",
     "physical_web_pages/physical_web_page_suggestions_provider.h",
     "pref_names.cc",
     "pref_names.h",
     "pref_util.cc",
     "pref_util.h",
     "remote/ntp_snippet.cc",
     "remote/ntp_snippet.h",
     "remote/ntp_snippets_fetcher.cc",
     "remote/ntp_snippets_fetcher.h",
-    "remote/ntp_snippets_scheduler.h",
+    "remote/persistent_scheduler.h",
     "remote/remote_suggestions_database.cc",
     "remote/remote_suggestions_database.h",
     "remote/remote_suggestions_provider.cc",
     "remote/remote_suggestions_provider.h",
     "remote/remote_suggestions_status_service.cc",
     "remote/remote_suggestions_status_service.h",
     "remote/request_throttler.cc",
     "remote/request_throttler.h",
+    "remote/scheduling_remote_suggestions_provider.cc",
+    "remote/scheduling_remote_suggestions_provider.h",
     "sessions/foreign_sessions_suggestions_provider.cc",
     "sessions/foreign_sessions_suggestions_provider.h",
     "sessions/tab_delegate_sync_adapter.cc",
     "sessions/tab_delegate_sync_adapter.h",
     "status.cc",
     "status.h",
     "switches.cc",
     "switches.h",
     "user_classifier.cc",
     "user_classifier.h",
@@ skipping 47 matching lines @@
   sources = [
     "bookmarks/bookmark_last_visit_utils_unittest.cc",
     "category_factory_unittest.cc",
     "content_suggestions_service_unittest.cc",
     "offline_pages/recent_tab_suggestions_provider_unittest.cc",
     "physical_web_pages/physical_web_page_suggestions_provider_unittest.cc",
     "remote/ntp_snippet_unittest.cc",
     "remote/ntp_snippets_fetcher_unittest.cc",
     "remote/remote_suggestions_database_unittest.cc",
     "remote/remote_suggestions_provider_unittest.cc",
+    "remote/remote_suggestions_scheduler_unittest.cc",
     "remote/remote_suggestions_status_service_unittest.cc",
     "remote/request_throttler_unittest.cc",
     "remote/test_utils.cc",
     "remote/test_utils.h",
     "sessions/foreign_sessions_suggestions_provider_unittest.cc",
   ]
 
   deps = [
     ":ntp_snippets",
     ":test_support",
@@ skipping 32 matching lines @@
   ]
 
   deps = [
     ":ntp_snippets",
     "//base",
     "//components/offline_pages/core",
     "//components/offline_pages/core:test_support",
     "//testing/gmock",
   ]
 }