Remove all remaining traces of MessageLoopProxy.

chrome/browser/metrics/leak_detector/leak_detector_controller.cc

 // Copyright 2016 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/metrics/leak_detector/leak_detector_controller.h"
 
 #include <algorithm>
 
 #include "base/logging.h"
 #include "base/strings/string_number_conversions.h"
@@ skipping 76 matching lines @@
 }
 
 }  // namespace
 
 LeakDetectorController::LeakDetectorController()
     : params_(GetVariationParameters()) {
   LeakDetector* detector = LeakDetector::GetInstance();
   detector->AddObserver(this);
 
   // Leak detector parameters are stored in |params_|.
-  detector->Init(params_, content::BrowserThread::GetMessageLoopProxyForThread(
+  detector->Init(params_, content::BrowserThread::GetTaskRunnerForThread(
                               content::BrowserThread::UI));
 }
 
 LeakDetectorController::~LeakDetectorController() {
   DCHECK(thread_checker_.CalledOnValidThread());
   LeakDetector::GetInstance()->RemoveObserver(this);
 }
 
 void LeakDetectorController::OnLeaksFound(
     const std::vector<MemoryLeakReportProto>& reports) {
   DCHECK(thread_checker_.CalledOnValidThread());
 
   for (const auto& report : reports) {
     // Store the report and insert stored parameters.
     stored_reports_.push_back(report);
     stored_reports_.back().mutable_params()->CopyFrom(params_);
   }
 }
 
 void LeakDetectorController::GetLeakReports(
     std::vector<MemoryLeakReportProto>* reports) {
   DCHECK(thread_checker_.CalledOnValidThread());
   *reports = std::move(stored_reports_);
 }
 
 }  // namespace metrics