Store PacketBuffer by value instead of as reference counted object

Bug: None
Change-Id: I5a594972e8a8dad731c927a1a374301e549f5d71
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/153887
Reviewed-by: Philip Eliasson <philipel@webrtc.org>
Reviewed-by: Åsa Persson <asapersson@webrtc.org>
Reviewed-by: Sam Zackrisson <saza@webrtc.org>
Commit-Queue: Danil Chapovalov <danilchap@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#29267}
diff --git a/modules/video_coding/packet_buffer.h b/modules/video_coding/packet_buffer.h
index 77fa6ad..ebbd974 100644
--- a/modules/video_coding/packet_buffer.h
+++ b/modules/video_coding/packet_buffer.h
@@ -16,7 +16,6 @@
 #include <set>
 #include <vector>
 
-#include "api/scoped_refptr.h"
 #include "api/video/encoded_image.h"
 #include "modules/include/module_common_types.h"
 #include "modules/video_coding/packet.h"
@@ -41,12 +40,11 @@
 
 class PacketBuffer {
  public:
-  static rtc::scoped_refptr<PacketBuffer> Create(
-      Clock* clock,
-      size_t start_buffer_size,
-      size_t max_buffer_size,
-      OnAssembledFrameCallback* frame_callback);
-
+  // Both |start_buffer_size| and |max_buffer_size| must be a power of 2.
+  PacketBuffer(Clock* clock,
+               size_t start_buffer_size,
+               size_t max_buffer_size,
+               OnAssembledFrameCallback* frame_callback);
   virtual ~PacketBuffer();
 
   // Returns true unless the packet buffer is cleared, which means that a key
@@ -65,16 +63,6 @@
   // Returns number of different frames seen in the packet buffer
   int GetUniqueFramesSeen() const;
 
-  int AddRef() const;
-  int Release() const;
-
- protected:
-  // Both |start_buffer_size| and |max_buffer_size| must be a power of 2.
-  PacketBuffer(Clock* clock,
-               size_t start_buffer_size,
-               size_t max_buffer_size,
-               OnAssembledFrameCallback* frame_callback);
-
  private:
   friend RtpFrameObject;
   // Since we want the packet buffer to be as packet type agnostic
@@ -181,8 +169,6 @@
   std::set<uint32_t> rtp_timestamps_history_set_ RTC_GUARDED_BY(crit_);
   // Stores the same unique timestamps in the order of insertion.
   std::queue<uint32_t> rtp_timestamps_history_queue_ RTC_GUARDED_BY(crit_);
-
-  mutable volatile int ref_count_ = 0;
 };
 
 }  // namespace video_coding