Cast Extensions API: Factory method for creating a cast session

chrome/renderer/extensions/webrtc_native_handler.h

 // Copyright 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 CHROME_RENDERER_EXTENSIONS_WEBRTC_NATIVE_HANDLER_H_
 #define CHROME_RENDERER_EXTENSIONS_WEBRTC_NATIVE_HANDLER_H_
 
 #include <map>
 
 #include "base/memory/linked_ptr.h"
+#include "base/memory/weak_ptr.h"
 #include "chrome/renderer/extensions/object_backed_native_handler.h"
+#include "chrome/renderer/extensions/scoped_persistent.h"
 #include "v8/include/v8.h"
 
 class CastSendTransport;
 class CastUdpTransport;
 
 namespace extensions {
 
 class ChromeV8Context;
 
 // Native code that handle chrome.webrtc custom bindings.
 class WebRtcNativeHandler : public ObjectBackedNativeHandler {
  public:
   explicit WebRtcNativeHandler(ChromeV8Context* context);
   virtual ~WebRtcNativeHandler();
 
  private:
-  void CreateCastSendTransport(
+  void CreateCastSession(
       const v8::FunctionCallbackInfo<v8::Value>& args);
+
   void DestroyCastSendTransport(
       const v8::FunctionCallbackInfo<v8::Value>& args);
   void CreateParamsCastSendTransport(
       const v8::FunctionCallbackInfo<v8::Value>& args);
   void GetCapsCastSendTransport(
       const v8::FunctionCallbackInfo<v8::Value>& args);
   void StartCastSendTransport(
       const v8::FunctionCallbackInfo<v8::Value>& args);
   void StopCastSendTransport(
       const v8::FunctionCallbackInfo<v8::Value>& args);
 
-  void CreateCastUdpTransport(
-      const v8::FunctionCallbackInfo<v8::Value>& args);
   void DestroyCastUdpTransport(
       const v8::FunctionCallbackInfo<v8::Value>& args);
   void StartCastUdpTransport(
       const v8::FunctionCallbackInfo<v8::Value>& args);
   void StopCastUdpTransport(
       const v8::FunctionCallbackInfo<v8::Value>& args);
 
+  // Helper method to call the v8 callback function after a session is
+  // created.
+  void CallCreateCallback(scoped_ptr<CastSendTransport> stream1,
+                          scoped_ptr<CastSendTransport> stream2,
+                          scoped_ptr<CastUdpTransport> udp_transport);
+
   // Gets the Send or UDP transport indexed by |transport_id|.
   // If not found, returns NULL and throws a V8 exception.
   CastSendTransport* GetSendTransportOrThrow(int transport_id) const;
   CastUdpTransport* GetUdpTransportOrThrow(int transport_id) const;
 
   int last_transport_id_;
 
   typedef std::map<int, linked_ptr<CastSendTransport> > SendTransportMap;
   SendTransportMap send_transport_map_;
 
   typedef std::map<int, linked_ptr<CastUdpTransport> > UdpTransportMap;
   UdpTransportMap udp_transport_map_;
 
+  base::WeakPtrFactory<WebRtcNativeHandler> weak_factory_;
+
+  extensions::ScopedPersistent<v8::Function> create_callback_;
+
   DISALLOW_COPY_AND_ASSIGN(WebRtcNativeHandler);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_RENDERER_EXTENSIONS_WEBRTC_NATIVE_HANDLER_H_