Migrate more files to histogram_macros.h from histogram.h.

extensions/browser/api/web_request/web_request_time_tracker.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 "extensions/browser/api/web_request/web_request_time_tracker.h"
 
 #include "base/bind.h"
 #include "base/compiler_specific.h"
-#include "base/metrics/histogram.h"
+#include "base/metrics/histogram_macros.h"
 #include "extensions/browser/warning_set.h"
 
 
 // TODO(mpcomplete): tweak all these constants.
 namespace {
 // The number of requests we keep track of at a time.
 const size_t kMaxRequestsLogged = 100u;
 
 // If a request completes faster than this amount (in ms), then we ignore it.
 // Any delays on such a request was negligible.
@@ skipping 224 matching lines @@
   // 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);
 }
 
 void ExtensionWebRequestTimeTracker::SetDelegate(
     ExtensionWebRequestTimeTrackerDelegate* delegate) {
   delegate_.reset(delegate);
 }