Revert of Move ForkWithFlags from sandbox/ to base/ and plug it into LaunchProcess.

base/process/process_unittest.cc

Index: base/process/process_unittest.cc
diff --git a/base/process/process_unittest.cc b/base/process/process_unittest.cc
index c2726d8f539f877f5a14f2571cfdc65adfc03166..5180f64c55a8111a5db6456570d1ac4d38f2776e 100644
--- a/base/process/process_unittest.cc
+++ b/base/process/process_unittest.cc
@@ -7,18 +7,10 @@
 #include "base/process/kill.h"
 #include "base/test/multiprocess_test.h"
 #include "base/test/test_timeouts.h"
-#include "base/third_party/dynamic_annotations/dynamic_annotations.h"
 #include "base/threading/platform_thread.h"
-#include "build/build_config.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "testing/multiprocess_func_list.h"
 
-#if defined(OS_LINUX)
-#include <errno.h>
-#include <sys/syscall.h>
-#include <sys/types.h>
-#include <unistd.h>
-#endif
 
 namespace {
 
@@ -209,41 +201,4 @@
   EXPECT_EQ(old_priority, new_priority);
 }
 
-#if defined(OS_LINUX)
-const int kSuccess = 0;
-const int kFail = 1;
-
-MULTIPROCESS_TEST_MAIN(CheckPidProcess) {
-  const pid_t kInitPid = 1;
-  const pid_t pid = syscall(__NR_getpid);
-  if (pid != kInitPid) {
-    return kFail;
-  }
-
-  if (!RunningOnValgrind() && getpid() != pid) {
-    return kFail;
-  }
-
-  return kSuccess;
-}
-
-TEST_F(ProcessTest, CloneFlags) {
-  LaunchOptions options;
-  options.clone_flags = CLONE_NEWUSER | CLONE_NEWPID | CLONE_NEWNET;
-
-  const ProcessHandle proc = SpawnChildWithOptions("CheckPidProcess", options);
-  if (proc == kNullProcessHandle && errno == EINVAL) {
-    // Some of the namespace types are not supported.
-    return;
-  }
-
-  Process process(proc);
-  ASSERT_TRUE(process.IsValid());
-
-  int exit_code = kFail;
-  EXPECT_TRUE(process.WaitForExit(&exit_code));
-  EXPECT_EQ(kSuccess, exit_code);
-}
-#endif
-
 }  // namespace base