Add a stub __cxa_demangle to disable LLVM's demangler.

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.
 
 import("//build/config/ui.gni")
 import("//testing/test.gni")
 
 if (is_android) {
   import("//build/config/android/rules.gni")
 }
@@ skipping 65 matching lines @@
     "android/base_jni_onload.h",
     "android/base_jni_registrar.cc",
     "android/base_jni_registrar.h",
     "android/build_info.cc",
     "android/build_info.h",
     "android/command_line_android.cc",
     "android/command_line_android.h",
     "android/content_uri_utils.cc",
     "android/content_uri_utils.h",
     "android/cpu_features.cc",
+    "android/cxa_demangle_stub.cc",
     "android/event_log.cc",
     "android/event_log.h",
     "android/field_trial_list.cc",
     "android/field_trial_list.h",
     "android/fifo_utils.cc",
     "android/fifo_utils.h",
     "android/important_file_writer_android.cc",
     "android/important_file_writer_android.h",
     "android/java_handler_thread.cc",
     "android/java_handler_thread.h",
@@ skipping 1468 matching lines @@
 
   # GYP: //base.gyp:base_java_unittest_support
   android_library("base_java_unittest_support") {
     deps = [
       ":base_java",
     ]
     java_files =
         [ "test/android/java/src/org/chromium/base/ContentUriTestUtils.java" ]
   }
 }