Only parse PPS up to PPS and SPS ids in the depacketizater.

webrtc/common_video/h264/pps_parser.h

Index: webrtc/common_video/h264/pps_parser.h
diff --git a/webrtc/common_video/h264/pps_parser.h b/webrtc/common_video/h264/pps_parser.h
index c84f2102782e09a443f812e4e2b99768d148228c..6c896fe8ea22b325297f30099936a4e8b88f354c 100644
--- a/webrtc/common_video/h264/pps_parser.h
+++ b/webrtc/common_video/h264/pps_parser.h
@@ -40,6 +40,11 @@ class PpsParser {
   // Unpack RBSP and parse PPS state from the supplied buffer.
   static rtc::Optional<PpsState> ParsePps(const uint8_t* data, size_t length);
 
+  static bool ParsePpsIds(const uint8_t* data,
+                          size_t length,
+                          uint32_t* pps_id,
+                          uint32_t* sps_id);
+
   static rtc::Optional<uint32_t> ParsePpsIdFromSlice(const uint8_t* data,
                                                      size_t length);
 
@@ -47,6 +52,9 @@ class PpsParser {
   // Parse the PPS state, for a bit buffer where RBSP decoding has already been
   // performed.
   static rtc::Optional<PpsState> ParseInternal(rtc::BitBuffer* bit_buffer);
+  static bool ParsePpsIdsInternal(rtc::BitBuffer* bit_buffer,
+                                  uint32_t* pps_id,
+                                  uint32_t* sps_id);
 };
 
 }  // namespace webrtc