Implement the Stream registry in content

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 "content/browser/streams/stream.h"
+#include "googleurl/src/gurl.h"
+
+namespace content {
+
+// Maintains a mapping of blob: URLs to active streams.
+class StreamRegistry  {

[kinuko, 2013/02/26 07:37:55]

Can we make it inherit from base::NonThreadSafe and have thread checks in each
method?

[Zachary Kuznia, 2013/02/26 08:30:03]

Done.

+ public:
+  StreamRegistry();
+  virtual ~StreamRegistry();
+
+  // Register a stream, and set its URL
+  void RegisterStream(scoped_refptr<Stream> stream);
+
+  // Clone a stream
+  void CloneStream(const GURL& url, const GURL& src_url);
+
+  void UnregisterStream(const GURL& url);
+
+  // Get the stream associated with |url|.  Returns NULL if there is no such
+  // stream.
+  scoped_refptr<Stream> GetStream(const GURL& url);
+
+  void OnStreamConsumed(Stream* stream);
+
+ private:
+  std::map<GURL, scoped_refptr<Stream> > streams_;
+
+  DISALLOW_COPY_AND_ASSIGN(StreamRegistry);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_STREAMS_STREAM_REGISTRY_H_
+
+