Do not create a temporary transport channel when using max-bundle

webrtc/pc/channel.h

Index: webrtc/pc/channel.h
diff --git a/webrtc/pc/channel.h b/webrtc/pc/channel.h
index 4518301d3b65e9e6fdf89586d258b519e42a4677..9af2471385fb2f9307f020e51878bae68a171779 100644
--- a/webrtc/pc/channel.h
+++ b/webrtc/pc/channel.h
@@ -72,7 +72,7 @@ class BaseChannel
               const std::string& content_name,
               bool rtcp);
   virtual ~BaseChannel();
-  bool Init();
+  bool Init(const std::string& transport_name);
   // Deinit may be called multiple times and is simply ignored if it's alreay
   // done.
   void Deinit();
@@ -335,7 +335,7 @@ class VoiceChannel : public BaseChannel {
                const std::string& content_name,
                bool rtcp);
   ~VoiceChannel();
-  bool Init();
+  bool Init(const std::string& transport_name);
 
   // Configure sending media on the stream with SSRC |ssrc|
   // If there is only one sending stream SSRC 0 can be used.
@@ -441,7 +441,7 @@ class VideoChannel : public BaseChannel {
                const std::string& content_name,
                bool rtcp);
   ~VideoChannel();
-  bool Init();
+  bool Init(const std::string& transport_name);
 
   // downcasts a MediaChannel
   virtual VideoMediaChannel* media_channel() const {
@@ -507,7 +507,7 @@ class DataChannel : public BaseChannel {
               const std::string& content_name,
               bool rtcp);
   ~DataChannel();
-  bool Init();
+  bool Init(const std::string& transport_name);
 
   virtual bool SendData(const SendDataParams& params,
                         const rtc::CopyOnWriteBuffer& payload,