Revert of Fix ProcessUtilTest.GetTerminationStatusCrash on Android L+…

… (patchset #2 id:20001 of https://codereview.chromium.org/1241333002/)

Reason for revert:
This patch broke the mips builder for Android

../../third_party/lss/linux_syscall_support.h:121:21: fatal error: sgidefs.h: No
such file or directory
 #include <sgidefs.h>

Original issue's description:
> Fix ProcessUtilTest.GetTerminationStatusCrash on Android L+
>
> On Android L+, signal and sigaction symbols are provided by libsigchain
> that override the system's versions. There is a bug in these functions
> where they essentially ignore requests to install SIG_DFL. This causes
> ProcessUtilTest.GetTerminationStatusCrash to fail (as
> CrashingChildProcess goes into infinite loop instead of crashing).
>
> Workaround this issue by explicitly performing a syscall to
> __NR_rt_sigaction to install SIG_DFL on Android, as breakpad does
> (see https://breakpad.appspot.com/1804002/).
>
> BUG=512255
> TEST=ProcessUtilTest.GetTerminationStatusCrash
>
> Committed: https://crrev.com/31510fe3e2d3b1f3123f391db52372b2506c46ca
> Cr-Commit-Position: refs/heads/master@{#339584}

[email protected],[email protected],[email protected]
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=512255

Review URL: https://codereview.chromium.org/1247023002

Cr-Commit-Position: refs/heads/master@{#339668}

base/DEPS

@@ -4,7 +4,6 @@ include_rules = [
   "+third_party/apple_apsl",
   "+third_party/libevent",
   "+third_party/dmg_fp",
-  "+third_party/lss",
   "+third_party/mach_override",
   "+third_party/modp_b64",
   "+third_party/tcmalloc",

base/process/process_util_unittest.cc

@@ -59,9 +59,6 @@
 #include <malloc/malloc.h>
 #include "base/mac/mac_util.h"
 #endif
-#if defined(OS_ANDROID)
-#include "third_party/lss/linux_syscall_support.h"
-#endif
 
 using base::FilePath;
 
@@ -229,19 +226,7 @@ const char kSignalFileCrash[] = "CrashingChildProcess.die";
 
 MULTIPROCESS_TEST_MAIN(CrashingChildProcess) {
   WaitToDie(ProcessUtilTest::GetSignalFilePath(kSignalFileCrash).c_str());
-#if defined(OS_ANDROID)
-  // Android L+ expose signal and sigaction symbols that override the system
-  // ones. There is a bug in these functions where a request to set the handler
-  // to SIG_DFL is ignored. In that case, an infinite loop is entered as the
-  // signal is repeatedly sent to the crash dump signal handler.
-  // To work around this, directly call the system's sigaction.
-  struct kernel_sigaction sa;
-  memset(&sa, 0, sizeof(sa));
-  sys_sigemptyset(&sa.sa_mask);
-  sa.sa_handler_ = SIG_DFL;
-  sa.sa_flags = SA_RESTART;
-  sys_rt_sigaction(SIGSEGV, &sa, NULL, sizeof(kernel_sigset_t));
-#elif defined(OS_POSIX)
+#if defined(OS_POSIX)
   // Have to disable to signal handler for segv so we can get a crash
   // instead of an abnormal termination through the crash dump handler.
   ::signal(SIGSEGV, SIG_DFL);