Remove Net.SpdyPriorityCount histogram.

net/spdy/spdy_session.cc

 // Copyright (c) 2012 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.
 
 #include "net/spdy/spdy_session.h"
 
 #include <algorithm>
 #include <limits>
 #include <map>
 #include <utility>
@@ skipping 932 matching lines @@
     return ERR_CONNECTION_CLOSED;
   }
 
   std::unique_ptr<SpdyStream> new_stream(
       new SpdyStream(request.type(), GetWeakPtr(), request.url(),
                      request.priority(), stream_initial_send_window_size_,
                      stream_max_recv_window_size_, request.net_log()));
   *stream = new_stream->GetWeakPtr();
   InsertCreatedStream(std::move(new_stream));
 
-  UMA_HISTOGRAM_CUSTOM_COUNTS(
-      "Net.SpdyPriorityCount",
-      static_cast<int>(request.priority()), 0, 10, 11);
-
   return OK;
 }
 
 void SpdySession::CancelStreamRequest(
     const base::WeakPtr<SpdyStreamRequest>& request) {
   DCHECK(request);
   RequestPriority priority = request->priority();
   CHECK_GE(priority, MINIMUM_PRIORITY);
   CHECK_LE(priority, MAXIMUM_PRIORITY);
 
@@ skipping 2373 matching lines @@
     if (!queue->empty()) {
       SpdyStreamId stream_id = queue->front();
       queue->pop_front();
       return stream_id;
     }
   }
   return 0;
 }
 
 }  // namespace net