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

components/offline_pages/core/background/mark_attempt_started_task_unittest.cc

 // 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.
 
-#include "components/offline_pages/background/mark_attempt_started_task.h"
+#include "components/offline_pages/core/background/mark_attempt_started_task.h"
 
 #include <memory>
 
 #include "base/bind.h"
 #include "base/test/test_simple_task_runner.h"
 #include "base/threading/thread_task_runner_handle.h"
-#include "components/offline_pages/background/request_queue_in_memory_store.h"
+#include "components/offline_pages/core/background/request_queue_in_memory_store.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace offline_pages {
 namespace {
 const int64_t kRequestId1 = 42;
 const int64_t kRequestId2 = 44;
 const GURL kUrl1("http://example.com");
 const ClientId kClientId1("download", "1234");
 }  // namespace
 
@@ skipping 119 matching lines @@
   PumpLoop();
   ASSERT_TRUE(last_result());
   EXPECT_EQ(1UL, last_result()->item_statuses.size());
   EXPECT_EQ(kRequestId2, last_result()->item_statuses.at(0).first);
   EXPECT_EQ(ItemActionStatus::NOT_FOUND,
             last_result()->item_statuses.at(0).second);
   EXPECT_EQ(0UL, last_result()->updated_items.size());
 }
 
 }  // namespace offline_pages