metrics: Connect leak detector to allocator

components/metrics/leak_detector/leak_detector_unittest.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 "components/metrics/leak_detector/leak_detector.h"
 
 #include <set>
 
+#include "base/allocator/allocator_extension.h"
 #include "base/macros.h"
 #include "base/memory/scoped_ptr.h"
 #include "content/public/test/test_browser_thread_bundle.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace metrics {
 
 namespace {
 
 // Default values for LeakDetector params. See header file for the meaning of
@@ skipping 96 matching lines @@
   for (const TestObserver* obs : {&obs1, &obs2, &obs3}) {
     EXPECT_EQ(6U, obs->reports().size());
     for (const auto& report : {reports1[0], reports1[1], reports1[2],
                                reports2[0], reports2[1], reports2[2]}) {
       EXPECT_TRUE(obs->reports().find(report) != obs->reports().end());
     }
   }
 }
 
 }  // namespace metrics