Remove MetricsServiceObserver in favor of MetricsProvider.

chrome/browser/chrome_browser_metrics_service_observer.cc

Index: chrome/browser/chrome_browser_metrics_service_observer.cc
diff --git a/chrome/browser/chrome_browser_metrics_service_observer.cc b/chrome/browser/chrome_browser_metrics_service_observer.cc
deleted file mode 100644
index d3549ef8987e74a4c9c210f45033b5062383b1f8..0000000000000000000000000000000000000000
--- a/chrome/browser/chrome_browser_metrics_service_observer.cc
+++ /dev/null
@@ -1,21 +0,0 @@
-// Copyright 2014 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/chrome_browser_metrics_service_observer.h"
-
-#include "chrome/browser/metrics/chrome_metrics_service_accessor.h"
-#include "net/base/network_change_notifier.h"
-
-ChromeBrowserMetricsServiceObserver::ChromeBrowserMetricsServiceObserver() {
-  ChromeMetricsServiceAccessor::AddMetricsServiceObserver(this);
-}
-
-ChromeBrowserMetricsServiceObserver::~ChromeBrowserMetricsServiceObserver() {
-  ChromeMetricsServiceAccessor::RemoveMetricsServiceObserver(this);
-}
-
-void ChromeBrowserMetricsServiceObserver::OnDidCreateMetricsLog() {
-  net::NetworkChangeNotifier::LogOperatorCodeHistogram(
-      net::NetworkChangeNotifier::GetConnectionType());
-}