memory coordinator: Add trace macros to track state changes

base/BUILD.gn

 # Copyright (c) 2013 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.
 
 # HOW TO WRITE CONDITIONALS IN THIS FILE
 # ======================================
 #
 # In many other places, one would write a conditional that expresses all the
 # cases when a source file is used or unused, and then either add or subtract
 # it from the sources list in that case
@@ skipping 451 matching lines @@
     "memory/aligned_memory.h",
     "memory/discardable_memory.cc",
     "memory/discardable_memory.h",
     "memory/discardable_memory_allocator.cc",
     "memory/discardable_memory_allocator.h",
     "memory/discardable_shared_memory.cc",
     "memory/discardable_shared_memory.h",
     "memory/free_deleter.h",
     "memory/linked_ptr.h",
     "memory/manual_constructor.h",
+    "memory/memory_coordinator_client.cc",
     "memory/memory_coordinator_client.h",
     "memory/memory_coordinator_client_registry.cc",
     "memory/memory_coordinator_client_registry.h",
     "memory/memory_coordinator_proxy.cc",
     "memory/memory_coordinator_proxy.h",
     "memory/memory_pressure_listener.cc",
     "memory/memory_pressure_listener.h",
     "memory/memory_pressure_monitor.cc",
     "memory/memory_pressure_monitor.h",
     "memory/memory_pressure_monitor_chromeos.cc",
@@ skipping 1981 matching lines @@
 }
 
 fuzzer_test("base_json_correctness_fuzzer") {
   sources = [
     "json/correctness_fuzzer.cc",
   ]
   deps = [
     ":base",
   ]
 }