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

components/offline_pages/background/network_quality_provider_stub.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/network_quality_provider_stub.h"
-
-namespace offline_pages {
-
-const char kOfflineNQPKey[] = "OfflineNQP";
-
-NetworkQualityProviderStub::NetworkQualityProviderStub()
-    : connection_type_(
-          net::EffectiveConnectionType::EFFECTIVE_CONNECTION_TYPE_3G) {}
-
-NetworkQualityProviderStub::~NetworkQualityProviderStub() {}
-
-// static
-NetworkQualityProviderStub* NetworkQualityProviderStub::GetUserData(
-    base::SupportsUserData* supports_user_data) {
-  return static_cast<NetworkQualityProviderStub*>(
-      supports_user_data->GetUserData(&kOfflineNQPKey));
-}
-
-// static
-void NetworkQualityProviderStub::SetUserData(
-    base::SupportsUserData* supports_user_data,
-    NetworkQualityProviderStub* stub) {
-  DCHECK(supports_user_data);
-  DCHECK(stub);
-  supports_user_data->SetUserData(&kOfflineNQPKey, stub);
-}
-
-void NetworkQualityProviderStub::AddEffectiveConnectionTypeObserver(
-    net::NetworkQualityEstimator::EffectiveConnectionTypeObserver* observer) {}
-
-void NetworkQualityProviderStub::RemoveEffectiveConnectionTypeObserver(
-    net::NetworkQualityEstimator::EffectiveConnectionTypeObserver* observer) {}
-
-net::EffectiveConnectionType
-NetworkQualityProviderStub::GetEffectiveConnectionType() const {
-  return connection_type_;
-}
-}  // namespace offline_pages