Googletest export

[fdio] Improve fdio_pipe_half signature, step 3.

The return value on fdio_pipe_half conflated two things: the error code
on failure (as a zx_status_t) or a file descriptor on success. This
technically worked, because they're both ints, the error code was always
negative, and the file descriptor always positive. However, the stated
return type of zx_status_t was misleading. This changes the signature
such that it always returns an actual zx_status_t, and the file
descriptor is returned through a pointer argument.

Also remove the last argument, since it was always given the same value.

This needs to be done as a soft transition because it's called from the
Dart runtime, from googletest, and from Crashpad, and Crashpad and
Chromium both depend on googletest on Fuchsia. The steps are as follows:
1) Add fdio_pipe_half2.
2) Update Dart to use fdio_pipe_half2.
3) Update googletest to use fdio_pipe_half2.
4) Roll updated googletest into Chronium.
5) Update Crashpad to use fdio_pipe_half2 and roll updated googletest into it.
6) Update fdio_pipe_half to match fdio_pipe_half2.
7) Update Dart to use fdio_pipe_half again.
8) Update googletest to use fdio_pipe_half again.
9) Roll updated googletest into Chronium.
10) Update Crashpad to use fdio_pipe_half again and roll updated googletest into it.
11) Remove fdio_pipe_half2.

This is step 3.

PiperOrigin-RevId: 241957137

googletest/src/gtest-death-test.cc

@@ -988,16 +988,16 @@ DeathTest::TestRole FuchsiaDeathTest::AssumeRole() {
   // Build the pipe for communication with the child.
   zx_status_t status;
   zx_handle_t child_pipe_handle;
-  uint32_t type;
-  status = fdio_pipe_half(&child_pipe_handle, &type);
-  GTEST_DEATH_TEST_CHECK_(status >= 0);
-  set_read_fd(status);
+  int child_pipe_fd;
+  status = fdio_pipe_half2(&child_pipe_fd, &child_pipe_handle);
+  GTEST_DEATH_TEST_CHECK_(status != ZX_OK);
+  set_read_fd(child_pipe_fd);
 
   // Set the pipe handle for the child.
   fdio_spawn_action_t spawn_actions[2] = {};
   fdio_spawn_action_t* add_handle_action = &spawn_actions[0];
   add_handle_action->action = FDIO_SPAWN_ACTION_ADD_HANDLE;
-  add_handle_action->h.id = PA_HND(type, kFuchsiaReadPipeFd);
+  add_handle_action->h.id = PA_HND(PA_FD, kFuchsiaReadPipeFd);
   add_handle_action->h.handle = child_pipe_handle;
 
   // Create a socket pair will be used to receive the child process' stderr.