Add support for redirecting ResourceHandlers to a blob: URL

content/browser/streams/chrome_stream_context.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_CHROME_STREAM_CONTEXT_H_
+#define CONTENT_BROWSER_STREAMS_CHROME_STREAM_CONTEXT_H_
+
+#include "base/memory/ref_counted.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/sequenced_task_runner_helpers.h"
+
+namespace content {
+class BrowserContext;
+struct ChromeStreamContextDeleter;
+class ChromeStreamRegistry;
+
+// A context class that keeps track of ChromeStreamRegistry used by the chrome.
+// There is an instance associated with each BrowserContext. There could be
+// multiple URLRequestContexts in the same browser context that refers to the
+// same instance.
+//
+// All methods, except the ctor, are expected to be called on
+// the IO thread (unless specifically called out in doc comments).
+class ChromeStreamContext
+    : public base::RefCountedThreadSafe<ChromeStreamContext,
+                                        ChromeStreamContextDeleter> {
+ public:
+  ChromeStreamContext();
+
+  static ChromeStreamContext* GetFor(BrowserContext* browser_context);
+
+  void InitializeOnIOThread();
+
+  ChromeStreamRegistry* registry() const { return registry_.get(); }
+
+ protected:
+  virtual ~ChromeStreamContext();
+
+ private:
+  friend class base::DeleteHelper<ChromeStreamContext>;
+  friend class base::RefCountedThreadSafe<ChromeStreamContext,
+                                          ChromeStreamContextDeleter>;
+  friend struct ChromeStreamContextDeleter;
+
+  void DeleteOnCorrectThread() const;
+
+  scoped_ptr<ChromeStreamRegistry> registry_;
+};
+
+struct ChromeStreamContextDeleter {
+  static void Destruct(const ChromeStreamContext* context) {
+    context->DeleteOnCorrectThread();
+  }
+};
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_STREAMS_CHROME_STREAM_CONTEXT_H_
+