Revert of components/metrics: Add runtime memory leak detector

components/metrics/BUILD.gn

Index: components/metrics/BUILD.gn
diff --git a/components/metrics/BUILD.gn b/components/metrics/BUILD.gn
index f711a59b56571968d4e2746556081ff64cfd6e2c..836c2431743ba5ddddb011e770022496e5f2880f 100644
--- a/components/metrics/BUILD.gn
+++ b/components/metrics/BUILD.gn
@@ -111,30 +111,6 @@
   }
 }
 
-# GYP version: components/metrics.gypi:metrics_leak_detector
-static_library("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_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",
-  ]
-}
-
 # GYP version: components/metrics.gypi:metrics_net
 static_library("net") {
   sources = [
@@ -263,22 +239,6 @@
       "//base",
     ]
   }
-}
-
-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/ranked_list_unittest.cc",
-  ]
-
-  deps = [
-    ":leak_detector",
-    "//testing/gtest",
-  ]
 }
 
 source_set("unit_tests") {
@@ -320,9 +280,5 @@
     sources += [ "serialization/serialization_utils_unittest.cc" ]
     deps += [ ":serialization" ]
   }
-
-  if (is_chromeos) {
-    deps += [ ":leak_detector_unit_tests" ]
-  }
 }
 # TODO(GYP): metrics_chromeos