Update from https://crrev.com/316786

sandbox/linux/services/android_mips_ucontext.h

Index: sandbox/linux/services/android_mips_ucontext.h
diff --git a/sandbox/linux/services/android_mips_ucontext.h b/sandbox/linux/services/android_mips_ucontext.h
deleted file mode 100644
index e23f1a769401bef54639e93a0b83aa2979b99bf5..0000000000000000000000000000000000000000
--- a/sandbox/linux/services/android_mips_ucontext.h
+++ /dev/null
@@ -1,51 +0,0 @@
-// Copyright 2014 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_MIPS_UCONTEXT_H_
-#define SANDBOX_LINUX_SERVICES_ANDROID_MIPS_UCONTEXT_H_
-
-// This is mostly copied from breakpad (common/android/include/sys/ucontext.h),
-// except we do use sigset_t for uc_sigmask instead of a custom type.
-#if !defined(__BIONIC_HAVE_UCONTEXT_T)
-// Ensure that 'stack_t' is defined.
-#include <asm/signal.h>
-
-// We also need greg_t for the sandbox, include it in this header as well.
-typedef unsigned long greg_t;
-
-typedef struct {
-  uint32_t regmask;
-  uint32_t status;
-  uint64_t pc;
-  uint64_t gregs[32];
-  uint64_t fpregs[32];
-  uint32_t acx;
-  uint32_t fpc_csr;
-  uint32_t fpc_eir;
-  uint32_t used_math;
-  uint32_t dsp;
-  uint64_t mdhi;
-  uint64_t mdlo;
-  uint32_t hi1;
-  uint32_t lo1;
-  uint32_t hi2;
-  uint32_t lo2;
-  uint32_t hi3;
-  uint32_t lo3;
-} mcontext_t;
-
-typedef struct ucontext {
-  uint32_t uc_flags;
-  struct ucontext* uc_link;
-  stack_t uc_stack;
-  mcontext_t uc_mcontext;
-  sigset_t uc_sigmask;
-  // Other fields are not used by Google Breakpad. Don't define them.
-} ucontext_t;
-
-#else
-#include <sys/ucontext.h>
-#endif  // __BIONIC_HAVE_UCONTEXT_T
-
-#endif  // SANDBOX_LINUX_SERVICES_ANDROID_MIPS_UCONTEXT_H_