PacketBuffer is now ref counted.

webrtc/modules/video_coding/packet_buffer.cc

Index: webrtc/modules/video_coding/packet_buffer.cc
diff --git a/webrtc/modules/video_coding/packet_buffer.cc b/webrtc/modules/video_coding/packet_buffer.cc
index df173504ff79af6be8ee667269e84596a45f270e..e740e1d2ed31dbfc160487ce7025accb5442002a 100644
--- a/webrtc/modules/video_coding/packet_buffer.cc
+++ b/webrtc/modules/video_coding/packet_buffer.cc
@@ -21,6 +21,15 @@
 namespace webrtc {
 namespace video_coding {
 
+rtc::scoped_refptr<PacketBuffer> PacketBuffer::Create(
+     Clock* clock,
+     size_t start_buffer_size,
+     size_t max_buffer_size,
+     OnCompleteFrameCallback* frame_callback) {
+    return rtc::scoped_refptr<PacketBuffer>(new PacketBuffer(clock,
+      start_buffer_size, max_buffer_size, frame_callback));
+}
+
 PacketBuffer::PacketBuffer(Clock* clock,
                            size_t start_buffer_size,
                            size_t max_buffer_size,
@@ -239,5 +248,17 @@ void PacketBuffer::Clear() {
   first_packet_received_ = false;
 }
 
+int PacketBuffer::AddRef() const {
+  return rtc::AtomicOps::Increment(&ref_count_);
+}
+
+int PacketBuffer::Release() const {
+  int count = rtc::AtomicOps::Decrement(&ref_count_);
+  if (!count) {
+    delete this;
+  }
+  return count;
+}
+
 }  // namespace video_coding
 }  // namespace webrtc