Do not use $ANDROID_TOOLCHAIN set by envsetup.sh.

build/android/gdb_content_shell

Index: build/android/gdb_content_shell
diff --git a/build/android/gdb_content_shell b/build/android/gdb_content_shell
deleted file mode 100755
index 81a1986a989a33265067c885cafa88245e98e18d..0000000000000000000000000000000000000000
--- a/build/android/gdb_content_shell
+++ /dev/null
@@ -1,16 +0,0 @@
-#!/bin/bash
-#
-# 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.
-#
-# Attach gdb to a running content shell. Redirect to the shell gdb_apk
-
-ROOT=$(cd "$(dirname $0)"; pwd)
-echo "WARNING: This script is deprecated, consider using \
-adb_gdb_content_shell instead!"
-if [ $# -gt 0 ]; then
-  exec ${ROOT}/gdb_apk -r -g "$*"
-else
-  exec ${ROOT}/gdb_apk -r -p org.chromium.content_shell_apk
-fi