ucontext_t support for Android x86.

sandbox/linux/services/android_ucontext.h

Index: sandbox/linux/services/android_ucontext.h
diff --git a/sandbox/linux/services/android_ucontext.h b/sandbox/linux/services/android_ucontext.h
new file mode 100644
index 0000000000000000000000000000000000000000..d9e9edcc43099d177188383121b33155d4454cf5
--- /dev/null
+++ b/sandbox/linux/services/android_ucontext.h
@@ -0,0 +1,21 @@
+// 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.
+
+#ifndef SANDBOX_LINUX_SERVICES_ANDROID_UCONTEXT_H_
+#define SANDBOX_LINUX_SERVICES_ANDROID_UCONTEXT_H_
+
+#if defined(__BIONIC_HAVE_UCONTEXT_T)
+#include <sys/ucontext.h>
+#else
+#if defined(__arm__)
+#include "sandbox/linux/services/android_arm_ucontext.h"
+#elif defined(__i386__)
+#include "sandbox/linux/services/android_x86_ucontext.h"
+#elif defined(__mips__)
+#error "Lack ucontext_t definition for mips on Android"
+#else
+#error "Unsupported CPU ABI for Android"
+#endif // __arm__
+#endif // __BIONIC_HAVE_UCONTEXT_T
+#endif // SANDBOX_LINUX_SERVICES_ANDROID_UCONTEXT_H_