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.
 
+import("//build/buildflag_header.gni")
+import("//components/metrics/leak_detector/leak_detector.gni")
+
+buildflag_header("metrics_flags") {
+  header = "metrics_flags.h"
+
+  flags = [
+    # Enable runtime leak detector.
+    "ENABLE_LEAK_DETECTOR=$enable_leak_detector",
+  ]
+}
+
 # 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",
     "clean_exit_beacon.h",
     "client_info.cc",
     "client_info.h",
     "cloned_install_detector.cc",
@@ skipping 39 matching lines @@
     "stability_metrics_helper.cc",
     "stability_metrics_helper.h",
     "system_memory_stats_recorder.h",
     "system_memory_stats_recorder_linux.cc",
     "system_memory_stats_recorder_win.cc",
     "url_constants.cc",
     "url_constants.h",
   ]
 
   public_deps = [
+    ":metrics_flags",
     "//components/metrics/proto",
   ]
   deps = [
     "//base",
     "//base:i18n",
     "//components/prefs",
     "//components/variations",
     "//third_party/zlib:compression_utils",
   ]
 
@@ skipping 40 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