Revert of Reduce plugin_metrics_provider_ usage in MetricsService

chrome/test/base/testing_browser_process.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 "chrome/test/base/testing_browser_process.h"
 
 #include "base/prefs/pref_service.h"
 #include "base/strings/string_util.h"
 #include "base/time/default_tick_clock.h"
 #include "build/build_config.h"
@@ skipping 78 matching lines @@
   // g_browser_process if it is not NULL, so it must be NULL before proceeding.
   DCHECK_EQ(static_cast<BrowserProcess*>(NULL), g_browser_process);
 }
 
 void TestingBrowserProcess::ResourceDispatcherHostCreated() {
 }
 
 void TestingBrowserProcess::EndSession() {
 }
 
-MetricsServicesManager* TestingBrowserProcess::GetMetricsServicesManager() {
-  return NULL;
-}
-
 MetricsService* TestingBrowserProcess::metrics_service() {
   return NULL;
 }
 
 rappor::RapporService* TestingBrowserProcess::rappor_service() {
   return NULL;
 }
 
 IOThread* TestingBrowserProcess::io_thread() {
   return io_thread_;
@@ skipping 316 matching lines @@
 
 ///////////////////////////////////////////////////////////////////////////////
 
 TestingBrowserProcessInitializer::TestingBrowserProcessInitializer() {
   TestingBrowserProcess::CreateInstance();
 }
 
 TestingBrowserProcessInitializer::~TestingBrowserProcessInitializer() {
   TestingBrowserProcess::DeleteInstance();
 }