Add heap allocator usage to task profiler.

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 17 matching lines @@
 import("//build/config/ui.gni")
 import("//build/nocompile.gni")
 import("//testing/libfuzzer/fuzzer_test.gni")
 import("//testing/test.gni")
 
 declare_args() {
   # Override this value to give a specific build date.
   # See //base/build_time.cc and //build/write_build_date_header.py for more
   # details and the expected format.
   override_build_date = "N/A"
+
+  # Turn on memory profiling in the task profiler when the heap shim is
+  # available, except for official builds for now.
+  enable_memory_task_profiler =
+      use_experimental_allocator_shim && !is_official_build
 }
 
 if (is_android) {
   import("//build/config/android/rules.gni")
 }
 
 config("base_flags") {
   if (is_clang) {
     cflags = [
       # Don't die on dtoa code that uses a char as an array index.
@@ skipping 1444 matching lines @@
     configs -= [ "//build/config/compiler:default_optimization" ]
     configs += [ "//build/config/compiler:optimize_max" ]
   }
 
   allow_circular_includes_from = public_deps
 }
 
 buildflag_header("debugging_flags") {
   header = "debugging_flags.h"
   header_dir = "base/debug"
-  flags = [ "ENABLE_PROFILING=$enable_profiling" ]
+  flags = [
+    "ENABLE_PROFILING=$enable_profiling",
+    "ENABLE_MEMORY_TASK_PROFILER=$enable_memory_task_profiler",
+  ]
 }
 
 # This is the subset of files from base that should not be used with a dynamic
 # library. Note that this library cannot depend on base because base depends on
 # base_static.
 static_library("base_static") {
   sources = [
     "base_switches.cc",
     "base_switches.h",
     "task_scheduler/switches.cc",
@@ skipping 989 matching lines @@
 }
 
 fuzzer_test("base_json_correctness_fuzzer") {
   sources = [
     "json/correctness_fuzzer.cc",
   ]
   deps = [
     ":base",
   ]
 }