Move all components/offline_pages/ files into component/offline_pages/core

chrome/browser/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/chrome_build.gni")
 import("//build/config/crypto.gni")
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//build/split_static_library.gni")
 import("//chrome/common/features.gni")
@@ skipping 1387 matching lines @@
     "//components/metrics_services_manager",
     "//components/mime_util",
     "//components/navigation_interception",
     "//components/navigation_metrics",
     "//components/net_log",
     "//components/network_hints/common",
     "//components/network_session_configurator",
     "//components/network_time",
     "//components/ntp_snippets",
     "//components/ntp_tiles",
-    "//components/offline_pages",
-    "//components/offline_pages/background:background_offliner",
-    "//components/offline_pages/downloads:offline_pages_ui_adapter",
-    "//components/offline_pages/request_header:request_header",
+    "//components/offline_pages/core",
+    "//components/offline_pages/core/background:background_offliner",
+    "//components/offline_pages/core/downloads:offline_pages_ui_adapter",
+    "//components/offline_pages/core/request_header:request_header",
     "//components/omnibox/browser",
     "//components/os_crypt",
     "//components/packed_ct_ev_whitelist",
     "//components/password_manager/content/browser",
     "//components/password_manager/core/browser",
     "//components/password_manager/core/common",
     "//components/password_manager/sync/browser",
     "//components/payments:payment_request",
     "//components/policy:generated",
     "//components/policy/core/browser",
@@ skipping 3023 matching lines @@
   # linking all of the test support.
   static_library("pepper_cdm_test_constants") {
     testonly = true
     visibility = [ "//chrome/*" ]
     sources = [
       "media/pepper_cdm_test_constants.cc",
       "media/pepper_cdm_test_constants.h",
     ]
   }
 }