Add use_allocator instead of linux_use_tcmalloc to switch the allocator.

tools/gn/secondary/ipc/BUILD.gn

 # Copyright (c) 2012 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.
 
 component("ipc") {
   external = true
   sources = [
     "file_descriptor_set_posix.cc",
     "file_descriptor_set_posix.h",
     "ipc_channel.cc",
@@ skipping 87 matching lines @@
     "unix_domain_socket_util_unittest.cc",
   ]
 
   if (is_win || is_ios) {
     sources -= [ "unix_domain_socket_util_unittest.cc" ]
   }
   #if (is_android && gtest_target_type == "shared_library") {
   #  deps += "/testing/android/native_test.gyp:native_testNative_code"
   #}
   #if (is_posix && !is_mac && !is_android) {
-  #  if (linux_use_tcmalloc) {
+  #  # TODO(dmikurube): Kill linux_use_tcmalloc. http://crbug.com/345554
+  #  if ((use_allocator!="none" && use_allocator!="see_use_tcmalloc") || (use_allocator=="see_use_tcmalloc" && linux_use_tcmalloc)) {
   #    deps += "/base/allocator"
   #  }
   #}
 
   deps = [
     ":ipc",
     ":test_support_ipc",
     "//base",
     "//base:base_i18n",
     "//base/test:run_all_unittests",
     "//base/test:test_support_base",
     "//testing/gtest",
   ]
 }
 
 test("ipc_perftests") {
   external = true
   sources = [
     "ipc_perftests.cc",
     "ipc_test_base.cc",
     "ipc_test_base.h",
   ]
 
   #if (is_android && gtest_target_type == "shared_library") {
   #  deps += "/testing/android/native_test.gyp:native_testNative_code"
   #}
   #if (is_posix && !is_mac && !is_android) {
-  #  if (linux_use_tcmalloc) {
+  #  # TODO(dmikurube): Kill linux_use_tcmalloc. http://crbug.com/345554
+  #  if ((use_allocator!="none" && use_allocator!="see_use_tcmalloc") || (use_allocator=="see_use_tcmalloc" && linux_use_tcmalloc)) {
   #    deps += "//base/allocator"
   #  }
   #}
 
   deps = [
     ":ipc",
     ":test_support_ipc",
     "//base",
     "//base:base_i18n",
     "//base/test:test_support_base",
@@ skipping 10 matching lines @@
     "ipc_test_sink.cc",
     "ipc_test_sink.h",
   ]
   deps = [
     ":ipc",
     "//base",
     "//testing/gtest",
   ]
 }