metrics: Connect leak detector to allocator

chrome/browser/metrics/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_controller.h"
 
 #include <algorithm>
 
 #include "base/logging.h"
 
 namespace metrics {
 
 namespace {
 
 // Default parameters for LeakDetector.
 const float kSamplingRate = 1.0f / 256;
 const int kMaxStackDepth = 4;
 const uint64_t kAnalysisIntervalBytes = 32 * 1024 * 1024;
 const int kSizeSuspicionThreshold = 4;
 const int kCallStackSuspicionThreshold = 4;
 
 }  // namespace
 
-LeakDetectorController::LeakDetectorController()
-    : detector_(kSamplingRate,
-                kMaxStackDepth,
-                kAnalysisIntervalBytes,
-                kSizeSuspicionThreshold,
-                kCallStackSuspicionThreshold) {
-  detector_.AddObserver(this);
+LeakDetectorController::LeakDetectorController() {
+  LeakDetector* detector = LeakDetector::GetInstance();
+  detector->Init(kSamplingRate, kMaxStackDepth, kAnalysisIntervalBytes,
+                 kSizeSuspicionThreshold, kCallStackSuspicionThreshold);
+  detector->AddObserver(this);
 }
 
 LeakDetectorController::~LeakDetectorController() {
   DCHECK(thread_checker_.CalledOnValidThread());
-  detector_.RemoveObserver(this);
+  LeakDetector::GetInstance()->RemoveObserver(this);
 }
 
 void LeakDetectorController::OnLeakFound(
     const LeakDetector::LeakReport& report) {
   DCHECK(thread_checker_.CalledOnValidThread());
 
   stored_reports_.push_back(MemoryLeakReportProto());
   MemoryLeakReportProto* proto = &stored_reports_.back();
 
   // Copy the contents of the report to the protobuf.
@@ skipping 10 matching lines @@
   proto->set_call_stack_suspicion_threshold(kCallStackSuspicionThreshold);
 }
 
 void LeakDetectorController::GetLeakReports(
     std::vector<MemoryLeakReportProto>* reports) {
   DCHECK(thread_checker_.CalledOnValidThread());
   *reports = std::move(stored_reports_);
 }
 
 }  // namespace metrics