Replace QuicheStringPiece with absl::string_view

Tested:
    TAP for global presubmit queue passed after automated deflaking of failures: http://mondo/deflaker/run/96cd5e40-b4cb-4ad8-8e9f-62d5c247385b http://mondo/deflaker/run/0a6209be-9013-4346-bd74-893b793b94d1 http://mondo/deflaker/run/f97a1fae-e543-4aea-a52f-88ddf6054d33
    http://test/OCL:335945875:BASE:335945937:1602132930213:6b6e6496
PiperOrigin-RevId: 336088095
Change-Id: I3a39387a5c382c401e0cf55b937dbd5babc7bdf3
26 files changed
tree: 2fc6299030f9abf1e86cee190fe7d9f276185adb
  1. common/
  2. epoll_server/
  3. http2/
  4. quic/
  5. spdy/
  6. CONTRIBUTING.md
  7. LICENSE
  8. README.md
README.md

QUICHE

QUICHE (QUIC, Http/2, Etc) is Google‘s implementation of QUIC and related protocols. It powers Chromium as well as Google’s QUIC servers and some other projects.