cleanup: Remove comments about lack of UseCounter support for workers.

third_party/WebKit/Source/modules/crypto/CryptoHistograms.h

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CryptoHistograms_h
 #define CryptoHistograms_h
 
 #include "public/platform/WebCrypto.h"
 
 // -------------------------------------------------------------
@@ skipping 70 matching lines @@
 //    ==> Increment CryptoAlgorithmRsaPss
 //    ==> Increment CryptoAlgorithmSha512
 //
 //  (Note that even though the key is just being exported, all of its
 //  algorithm parameters are also recorded)
 //
 // -----------------------
 // Caveats
 // -----------------------
 //
-//   * Usage counters are incomplete for shared workers and service workers
-//   (http://crbug.com/376039)
-//
 //   * Measurements when there are errors (the Promise is rejected) are
 //   inconsistent.
 //
 //   In some cases the underlying UseCounter is incremented, in
 //   others it isn't. It depends how early the error occured. For instance if
 //   an error was thrown by the binding layer, then no usage will be recorded
 //   for the algorithm/key in question.
 //
 //   Most of these early errors correspond with caller errors of WebCrypto so
 //   they shouldn't skew the stats.
@@ skipping 14 matching lines @@
 
 // This is a convenience function for calling histogramAlgorithm() and
 // histogramKey().
 void HistogramAlgorithmAndKey(ExecutionContext*,
                               const WebCryptoAlgorithm&,
                               const WebCryptoKey&);
 
 }  // namespace blink
 
 #endif