Move Cache Storage API implementation to modules/cachestorage

Source/modules/serviceworkers/GlobalCacheStorage.h

Index: Source/modules/serviceworkers/GlobalCacheStorage.h
diff --git a/Source/modules/serviceworkers/GlobalCacheStorage.h b/Source/modules/serviceworkers/GlobalCacheStorage.h
deleted file mode 100644
index a00b7b17cbb2a4031400c8993fc499cd7af8f16c..0000000000000000000000000000000000000000
--- a/Source/modules/serviceworkers/GlobalCacheStorage.h
+++ /dev/null
@@ -1,23 +0,0 @@
-// Copyright 2015 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 GlobalCacheStorage_h
-#define GlobalCacheStorage_h
-
-namespace blink {
-
-class CacheStorage;
-class DOMWindow;
-class ExceptionState;
-class WorkerGlobalScope;
-
-class GlobalCacheStorage {
-public:
-    static CacheStorage* caches(DOMWindow&, ExceptionState&);
-    static CacheStorage* caches(WorkerGlobalScope&, ExceptionState&);
-};
-
-} // namespace blink
-
-#endif // GlobalCacheStorage_h