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

components/offline_pages/client_namespace_constants.h

Index: components/offline_pages/client_namespace_constants.h
diff --git a/components/offline_pages/client_namespace_constants.h b/components/offline_pages/client_namespace_constants.h
deleted file mode 100644
index 823af09cc00e77a5d98fd11514972ec629b5c199..0000000000000000000000000000000000000000
--- a/components/offline_pages/client_namespace_constants.h
+++ /dev/null
@@ -1,26 +0,0 @@
-// 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.
-
-#ifndef COMPONENTS_OFFLINE_PAGES_CLIENT_NAMESPACE_CONSTANTS_H_
-#define COMPONENTS_OFFLINE_PAGES_CLIENT_NAMESPACE_CONSTANTS_H_
-
-#include "build/build_config.h"
-
-namespace offline_pages {
-
-// Any changes to these well-known namespaces should also be reflected in
-// OfflinePagesNamespace (histograms.xml) for consistency.
-extern const char kBookmarkNamespace[];
-extern const char kLastNNamespace[];
-extern const char kAsyncNamespace[];
-extern const char kCCTNamespace[];
-extern const char kDownloadNamespace[];
-extern const char kNTPSuggestionsNamespace[];
-
-// Currently used for fallbacks like tests.
-extern const char kDefaultNamespace[];
-
-}  // namespace offline_pages
-
-#endif  // COMPONENTS_OFFLINE_PAGES_CLIENT_NAMESPACE_CONSTANTS_H_