metrics: Add leak detector controller in Chrome OS metrics system

components/metrics/BUILD.gn

 # 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.
 
 # GYP version: components/metrics.gypi:metrics
 source_set("metrics") {
   sources = [
     "call_stack_profile_metrics_provider.cc",
     "call_stack_profile_metrics_provider.h",
     "clean_exit_beacon.cc",
@@ skipping 104 matching lines @@
   source_set("leak_detector") {
     sources = [
       "leak_detector/call_stack_manager.cc",
       "leak_detector/call_stack_manager.h",
       "leak_detector/call_stack_table.cc",
       "leak_detector/call_stack_table.h",
       "leak_detector/custom_allocator.cc",
       "leak_detector/custom_allocator.h",
       "leak_detector/leak_analyzer.cc",
       "leak_detector/leak_analyzer.h",
+      "leak_detector/leak_detector.cc",
+      "leak_detector/leak_detector.h",
       "leak_detector/leak_detector_impl.cc",
       "leak_detector/leak_detector_impl.h",
       "leak_detector/leak_detector_value_type.cc",
       "leak_detector/leak_detector_value_type.h",
       "leak_detector/ranked_list.cc",
       "leak_detector/ranked_list.h",
     ]
 
     deps = [
       "//base",
@@ skipping 142 matching lines @@
 }
 
 if (is_chromeos) {
   source_set("leak_detector_unit_tests") {
     testonly = true
     sources = [
       "leak_detector/call_stack_manager_unittest.cc",
       "leak_detector/call_stack_table_unittest.cc",
       "leak_detector/leak_analyzer_unittest.cc",
       "leak_detector/leak_detector_impl_unittest.cc",
+      "leak_detector/leak_detector_unittest.cc",
       "leak_detector/ranked_list_unittest.cc",
     ]
 
     deps = [
       ":leak_detector",
       "//base",
       "//testing/gtest",
     ]
   }
 }
@@ skipping 38 matching lines @@
   if (is_linux) {
     sources += [ "serialization/serialization_utils_unittest.cc" ]
     deps += [ ":serialization" ]
   }
 
   if (is_chromeos) {
     deps += [ ":leak_detector_unit_tests" ]
   }
 }
 # TODO(GYP): metrics_chromeos