Revert 187230

content/browser/streams/stream_registry.h

-// Copyright (c) 2013 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 CONTENT_BROWSER_STREAMS_STREAM_REGISTRY_H_
-#define CONTENT_BROWSER_STREAMS_STREAM_REGISTRY_H_
-
-#include <map>
-
-#include "base/basictypes.h"
-#include "base/memory/ref_counted.h"
-#include "base/threading/non_thread_safe.h"
-#include "content/common/content_export.h"
-#include "googleurl/src/gurl.h"
-
-namespace content {
-
-class Stream;
-
-// Maintains a mapping of blob: URLs to active streams.
-class CONTENT_EXPORT StreamRegistry : public base::NonThreadSafe {
- public:
-  StreamRegistry();
-  virtual ~StreamRegistry();
-
-  // Registers a stream, and sets its URL.
-  void RegisterStream(scoped_refptr<Stream> stream);
-
-  // Clones a stream.  Returns true on success, or false if |src_url| doesn't
-  // exist.
-  bool CloneStream(const GURL& url, const GURL& src_url);
-
-  void UnregisterStream(const GURL& url);
-
-  // Gets the stream associated with |url|.  Returns NULL if there is no such
-  // stream.
-  scoped_refptr<Stream> GetStream(const GURL& url);
-
- private:
-  typedef std::map<GURL, scoped_refptr<Stream> > StreamMap;
-
-  StreamMap streams_;
-
-  DISALLOW_COPY_AND_ASSIGN(StreamRegistry);
-};
-
-}  // namespace content
-
-#endif  // CONTENT_BROWSER_STREAMS_STREAM_REGISTRY_H_
-
-