Hi Team, I am not sure on the uses internally but I just wanted to create this bug so if this can be removed similar to how Blink removed in 2015 then we should get rid of this: Blink Commit - https://chromium.googlesource.com/chromium/blink/+/15865e3dd893e80939987d37a04c45f7bb5bcbe7 From the history of commit to file, it seems that they are infrequent: https://github.com/WebKit/WebKit/commits/68b73575a9aa740856dde6a891945e21a4a8b207/Source/WTF/wtf/StreamBuffer.h Thanks!
StreamBuffer is used in WebKit, as evidenced by "grep -r StreamBuffer Source". I don't think that tracking Blink refactoring patches is worth the time - the engines have diverged a lot, and we won't necessarily want to make the same choices anyway.