Support for onbufferedamountlow

talk/app/webrtc/objc/RTCDataChannel.mm

Index: talk/app/webrtc/objc/RTCDataChannel.mm
diff --git a/talk/app/webrtc/objc/RTCDataChannel.mm b/talk/app/webrtc/objc/RTCDataChannel.mm
index 4fb03c284ebbb7e2e1ca8427bfabfee882cfc54f..bfe0bebdfe37a38afe2d5f741a5c1c3c9fc6f6e0 100644
--- a/talk/app/webrtc/objc/RTCDataChannel.mm
+++ b/talk/app/webrtc/objc/RTCDataChannel.mm
@@ -43,6 +43,15 @@ class RTCDataChannelObserver : public DataChannelObserver {
     [_channel.delegate channelDidChangeState:_channel];
   }
 
+  void OnBufferedAmountChange(uint64 previousAmount) override {
+    RTCDataChannel* channel = _channel;  // Converts weak ptr to strong ptr.

[tkchin_webrtc, 2015/06/30 17:53:47]

don't need the comment, fairly standard practice.

[bemasc2, 2015/06/30 18:29:45]

OK, removed comment.

+    id<RTCDataChannelDelegate> delegate = channel.delegate;
+    if ([delegate
+            respondsToSelector:@selector(channel:didChangeBufferedAmount:)]) {
+      [delegate channel:channel didChangeBufferedAmount:previousAmount];
+    }
+  }
+
   void OnMessage(const DataBuffer& buffer) override {
     if (!_channel.delegate) {
       return;