Move StatisticsRecorder out of histogram.cc/h for further refactoring.

net/url_request/url_request_throttler_unittest.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/url_request/url_request_throttler_manager.h"
 
 #include "base/memory/scoped_ptr.h"
 #include "base/metrics/histogram.h"
+#include "base/metrics/statistics_recorder.h"
 #include "base/pickle.h"
 #include "base/stringprintf.h"
 #include "base/string_number_conversions.h"
 #include "base/time.h"
 #include "net/base/load_flags.h"
 #include "net/base/test_completion_callback.h"
 #include "net/url_request/url_request_context.h"
 #include "net/url_request/url_request_test_util.h"
 #include "net/url_request/url_request_throttler_header_interface.h"
 #include "net/url_request/url_request_throttler_test_support.h"
@@ skipping 525 matching lines @@
         FAIL();
     }
 
     scoped_refptr<net::URLRequestThrottlerEntryInterface> entry_after =
         manager.RegisterRequestUrl(GURL("http://www.example.com/"));
     EXPECT_FALSE(entry_after->ShouldRejectRequest(request_));
   }
 }
 
 }  // namespace net