Remove {linux|android}_use_tcmalloc and switch to use_allocator in Chromium.

url/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.
 
 component("url") {
   if (is_win) {
     # Don't conflict with Windows' "url.dll".
     output_name = "url_lib"
   }
   sources = [
@@ skipping 48 matching lines @@
   test("url_unittests") {
     sources = [
       "gurl_unittest.cc",
       "url_canon_unittest.cc",
       "url_parse_unittest.cc",
       "url_test_utils.h",
       "url_util_unittest.cc",
     ]
 
     #if (is_posix && !is_mac && !is_ios) {
-    #  # 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) {
+    #  if (use_allocator!="none") {
     #    deps += "//base/allocator"
     #  }
     #}
 
     # if (is_win) {
     #   TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
     #   'msvs_disabled_warnings': [ 4267, ]
     # }
 
     deps = [
       ":url",
       "//base:i18n",
       "//base/test:run_all_unittests",
       "//testing/gtest",
       "//third_party/icu:icuuc",
     ]
   }
 }