(Owner approval for) Delay network requests on startup if any webRequest ...

chrome/browser/extensions/extension_webrequest_time_tracker.cc

 // Copyright (c) 2011 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 "chrome/browser/extensions/extension_webrequest_time_tracker.h"
 
 #include "base/metrics/histogram.h"
 
 // TODO(mpcomplete): tweak all these constants.
 namespace {
@@ skipping 63 matching lines @@
   RequestTimeLog& log = request_time_logs_[request_id];
   if (log.completed)
     return;
 
   log.request_duration = end_time - log.request_start_time;
   log.completed = true;
 
   if (log.extension_block_durations.empty())
     return;
 
-  HISTOGRAM_TIMES("Extensions.NetworkDelay", log.block_duration);
+  UMA_HISTOGRAM_TIMES("Extensions.NetworkDelay", log.block_duration);
 
   Analyze(request_id);
 }
 
 void ExtensionWebRequestTimeTracker::Analyze(int64 request_id) {
   RequestTimeLog& log = request_time_logs_[request_id];
 
   // Ignore really short requests. Time spent on these is negligible, and any
   // extra delay the extension adds is likely to be noise.
   if (log.request_duration.InMilliseconds() < kMinRequestTimeToCareMs)
@@ skipping 50 matching lines @@
   // might average out to only being "25% slow".
   request_time_logs_.erase(request_id);
 }
 
 void ExtensionWebRequestTimeTracker::SetRequestRedirected(int64 request_id) {
   // When a request is redirected, we have no way of knowing how long the
   // request would have taken, so we can't say how much an extension slowed
   // down this request. Just ignore it.
   request_time_logs_.erase(request_id);
 }