Hook up the tsan flag for the GN build.

Add a flag to disable GLIBCXX_DEBUG which is used in the GYP build on some bots.

TBR=scottmg

Review URL: https://codereview.chromium.org/141703004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@245577 0039d316-1c4b-4281-b951-d872f2087c98

build/config/BUILD.gn

@@ -2,6 +2,14 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
+declare_args() {
+  # When set, turns off the definition of _GLIBCXX_DEBUG when it would
+  # otherwise be set. Setting _GLIBCXX_DEBUG adds iterator debugging stuff
+  # that is usually helpful in debugging, but can cause problems in some
+  # contexts.
+  disable_glibcxx_debug = false
+}
+
 config("my_msvs") {
   defines = [
       "CHROMIUM_BUILD",
@@ -48,7 +56,7 @@ config("debug") {
     "WTF_USE_DYNAMIC_ANNOTATIONS=1",
   ]
 
-  if (is_linux && !is_android && cpu_arch == "x64") {
+  if (is_linux && !is_android && cpu_arch == "x64" && !disable_glibcxx_debug) {
     # Enable libstdc++ debugging facilities to help catch problems early, see
     # http://crbug.com/65151 .
     # TODO(phajdan.jr): Should we enable this for all of POSIX?

build/gyp_chromium

@@ -177,6 +177,7 @@ def GetArgsStringForGN(supplemental_files):
       ('buildtype', 'Official', 'is_official_build=true'),
       ('component', 'shared_library', 'is_component_build=true'),
       ('clang', '1', 'is_clang=true'),
+      ('disable_glibcxx_debug', '1', 'disable_glibcxx_debug=true'),
       ('target_arch', 'ia32', 'cpu_arch="x86"'),
       ('target_arch', 'x64', 'cpu_arch="x64" force_win64=true'),
       ('target_arch', 'arm', 'cpu_arch="arm"'),
@@ -191,6 +192,7 @@ def GetArgsStringForGN(supplemental_files):
       ('use_goma', '1', 'use_goma=true'),
       ('asan', '1', 'is_asan=true'),
       ('lsan', '1', 'is_lsan=true'),
+      ('tsan', '1', 'is_tsan=true'),
   ]
   for i in remap_cases:
     if i[0] in vars_dict and vars_dict[i[0]] == i[1]: