memory-infra: Finish moving to Mojo (2nd attempt)

components/tracing/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("//testing/test.gni")
 import("//third_party/protobuf/proto_library.gni")
 
 component("tracing") {
   sources = [
-    "child/child_memory_dump_manager_delegate_impl.cc",
-    "child/child_memory_dump_manager_delegate_impl.h",
     "child/child_trace_message_filter.cc",
     "child/child_trace_message_filter.h",
     "common/graphics_memory_dump_provider_android.cc",
     "common/graphics_memory_dump_provider_android.h",
     "common/process_metrics_memory_dump_provider.cc",
     "common/process_metrics_memory_dump_provider.h",
     "common/tracing_messages.cc",
     "common/tracing_messages.h",
     "core/proto_utils.cc",
     "core/proto_utils.h",
@@ skipping 117 matching lines @@
     "//testing/scripts/common.py",
     "//testing/xvfb.py",
     "//testing/scripts/run_gtest_perf_test.py",
     "//tools/perf/generate_legacy_perf_dashboard_json.py",
   ]
 
   if (is_android) {
     deps += [ "//testing/android/native_test:native_test_native_code" ]
   }
 }