Enable the memory task profiler in all builds where the heap shim is available.

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 20 matching lines @@
 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 || is_syzyasan)
+  # available. The can then be enabled at runtime by passing the command line

[gab, 2017/02/17 21:13:27]

"The can then" ? :)

[Sigurður Ásgeirsson, 2017/02/17 21:49:26]

Ugh - I have the best words, don't I :)
English is hard, especially writing it or reading it. So are most other
languages, I think it's in the words and how they are supposed to go together
and make "sense". I don't get it. Sad.

+  # flag --enable-heap-profiling=task-profiler.
+  enable_memory_task_profiler = use_experimental_allocator_shim
 
   # Partition alloc is included by default except iOS.
   use_partition_alloc = !is_ios
 }
 
 if (is_android) {
   import("//build/config/android/rules.gni")
 }
 
 config("base_flags") {
@@ skipping 2592 matching lines @@
 }
 
 fuzzer_test("base_json_correctness_fuzzer") {
   sources = [
     "json/correctness_fuzzer.cc",
   ]
   deps = [
     ":base",
   ]
 }