stream_generator.h doesn't use anything from <string.h>. Replace <string.h> with <stdint.h> for the intXXX_t typedefs. Rename packet_buffer to packet_buffer_ to conform to the naming convention of data members. R=marpan@google.com, marpan@webrtc.org, phoglund@webrtc.org BUG=none TEST=none Review URL: https://webrtc-codereview.appspot.com/51949004 Cr-Commit-Position: refs/heads/master@{#9387}