LSC: Replace deprecated thread annotations macros.

Abseil thread annotation macros are now prefixed by ABSL_.

There is no semantic change; this is just a rename.
The edits were generated by devtools/cymbal/tools/run_clang_mr_refactor.sh

LSC documentation: go/absl-prefixed-thread-annotations-lsc
LSC approval http://b/135729553

Tested: TGP

Tested:
    TAP --sample ran all affected tests and none failed
    http://test/OCL:265862636:BASE:265839422:1566982650751:76646382
PiperOrigin-RevId: 265958257
Change-Id: Idaa812b2d95b5a0dc6a2383bf2e3f7bcf635ce5a

quic/qbone/bonnet/icmp_reachable.h

diff --git a/quic/qbone/bonnet/icmp_reachable.h b/quic/qbone/bonnet/icmp_reachable.h
index 4b6403e..324be8b 100644
--- a/quic/qbone/bonnet/icmp_reachable.h
+++ b/quic/qbone/bonnet/icmp_reachable.h
@@ -75,9 +75,10 @@
 
   // Initializes this reachability probe. Must be called from within the
   // |epoll_server|'s thread.
-  bool Init() LOCKS_EXCLUDED(header_lock_) override;
+  bool Init() ABSL_LOCKS_EXCLUDED(header_lock_) override;
 
-  int64 /* allow-non-std-int */ OnAlarm() LOCKS_EXCLUDED(header_lock_) override;
+  int64 /* allow-non-std-int */ OnAlarm()
+      ABSL_LOCKS_EXCLUDED(header_lock_) override;
 
   static QuicStringPiece StatusName(Status status);
 
@@ -110,7 +111,7 @@
     IcmpReachable* reachable_;
   };
 
-  bool OnEvent(int fd) LOCKS_EXCLUDED(header_lock_);
+  bool OnEvent(int fd) ABSL_LOCKS_EXCLUDED(header_lock_);
 
   const absl::Duration timeout_;
 
@@ -128,7 +129,7 @@
   int recv_fd_;
 
   QuicMutex header_lock_;
-  icmp6_hdr icmp_header_ GUARDED_BY(header_lock_){};
+  icmp6_hdr icmp_header_ ABSL_GUARDED_BY(header_lock_){};
 
   absl::Time start_ = absl::InfinitePast();
   absl::Time end_ = absl::InfinitePast();