Update from https://crrev.com/316786

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
deleted file mode 100644
index 2814710096bb0a603ea05cb580af70f3813b8392..0000000000000000000000000000000000000000
--- a/sandbox/linux/services/android_ucontext.h
+++ /dev/null
@@ -1,28 +0,0 @@
-// 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.
-
-#ifndef SANDBOX_LINUX_SERVICES_ANDROID_UCONTEXT_H_
-#define SANDBOX_LINUX_SERVICES_ANDROID_UCONTEXT_H_
-
-#if defined(__ANDROID__)
-
-#if defined(__arm__)
-#include "sandbox/linux/services/android_arm_ucontext.h"
-#elif defined(__i386__)
-#include "sandbox/linux/services/android_i386_ucontext.h"
-#elif defined(__x86_64__)
-#include "sandbox/linux/services/android_x86_64_ucontext.h"
-#elif defined(__mips__)
-#include "sandbox/linux/services/android_mips_ucontext.h"
-#elif defined(__aarch64__)
-#include "sandbox/linux/services/android_arm64_ucontext.h"
-#else
-#error "No support for your architecture in Android header"
-#endif
-
-#else  // __ANDROID__
-#error "Android header file included on non Android."
-#endif  // __ANDROID__
-
-#endif  // SANDBOX_LINUX_SERVICES_ANDROID_UCONTEXT_H_