Add Resource Handler for creating Streams to forward to extensions

chrome/browser/extensions/api/streams_private/streams_private_api.h

 // Copyright (c) 2012 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 CHROME_BROWSER_EXTENSIONS_API_STREAMS_PRIVATE_STREAMS_PRIVATE_API_H_
 #define CHROME_BROWSER_EXTENSIONS_API_STREAMS_PRIVATE_STREAMS_PRIVATE_API_H_
 
 #include <map>
 #include <string>
 #include <vector>
 
 #include "base/values.h"
 #include "chrome/browser/extensions/api/profile_keyed_api_factory.h"
 #include "chrome/browser/extensions/extension_function.h"
 #include "chrome/browser/profiles/profile_keyed_service.h"
 #include "chrome/common/extensions/extension.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 
 class Profile;
 
+namespace content {
+class StreamHandle;
+}
+
 namespace extensions {
 
-class StreamsPrivateAPI : public ProfileKeyedAPI {
+class StreamsPrivateAPI : public ProfileKeyedAPI,
+                          public content::NotificationObserver {
  public:
+  // Convenience method to get the StreamsPrivateAPI for a profile.
+  static StreamsPrivateAPI* Get(Profile* profile);
+
   explicit StreamsPrivateAPI(Profile* profile);
   virtual ~StreamsPrivateAPI();
 
+  void ExecuteMimeTypeHandler(const std::string& extension_id,
+                              scoped_ptr<content::StreamHandle> stream,
+                              const std::string& mime_type,
+                              const GURL& original_url);
+
   // ProfileKeyedAPI implementation.
   static ProfileKeyedAPIFactory<StreamsPrivateAPI>* GetFactoryInstance();
 
+  // content::NotificationObserver implementation.
+  virtual void Observe(int type,
+                       const content::NotificationSource& source,
+                       const content::NotificationDetails& details) OVERRIDE;
+
  private:
   friend class ProfileKeyedAPIFactory<StreamsPrivateAPI>;
+  typedef std::map<std::string,
+                   std::map<GURL,
+                            linked_ptr<content::StreamHandle> > > StreamMap;
+
+  void OnStreamClosed(const std::string& extension_id, const GURL& url);
 
   // ProfileKeyedAPI implementation.
   static const char* service_name() {
     return "StreamsPrivateAPI";
   }
   static const bool kServiceIsNULLWhileTesting = true;
 
   Profile* const profile_;
+  content::NotificationRegistrar registrar_;
+  StreamMap streams_;
+  base::WeakPtrFactory<StreamsPrivateAPI> weak_ptr_factory_;
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_STREAMS_PRIVATE_STREAMS_PRIVATE_API_H_