Do not redirect stderr of Apache process

Apache gets stuck when the pipe connected to stderr gets filled up and
not read. This patch makes stderr of apache directly goes to build log.

BUG=30536, 431172

Review URL: https://codereview.chromium.org/712253002

git-svn-id: svn://svn.chromium.org/blink/trunk@185164 bbb929c8-8fbe-4397-9dbb-9b2b20218538

third_party/WebKit/Tools/Scripts/webkitpy/layout_tests/servers/apache_http.py

@@ -126,12 +126,10 @@ class ApacheHTTP(server_base.ServerBase):
 
     def _spawn_process(self):
         _log.debug('Starting %s server, cmd="%s"' % (self._name, str(self._start_cmd)))
-        self._process = self._executive.popen(self._start_cmd, stderr=self._executive.PIPE)
-        if self._process.returncode is not None:
-            retval = self._process.returncode
-            err = self._process.stderr.read()
-            if retval or len(err):
-                raise server_base.ServerError('Failed to start %s: %s' % (self._name, err))
+        self._process = self._executive.popen(self._start_cmd)
+        retval = self._process.returncode
+        if retval:
+            raise server_base.ServerError('Failed to start %s: %s' % (self._name, retval))
 
         # For some reason apache isn't guaranteed to have created the pid file before
         # the process exits, so we wait a little while longer.