In Linux Port, make a dummy HOME directory for running tests.

third_party/WebKit/Tools/Scripts/webkitpy/layout_tests/port/linux.py

Index: third_party/WebKit/Tools/Scripts/webkitpy/layout_tests/port/linux.py
diff --git a/third_party/WebKit/Tools/Scripts/webkitpy/layout_tests/port/linux.py b/third_party/WebKit/Tools/Scripts/webkitpy/layout_tests/port/linux.py
index beed25906b46949746f847f4716d56a6c0b76d23..568eda66065150b25ff8a4cdd5c8882cad6b6ed2 100644
--- a/third_party/WebKit/Tools/Scripts/webkitpy/layout_tests/port/linux.py
+++ b/third_party/WebKit/Tools/Scripts/webkitpy/layout_tests/port/linux.py
@@ -27,10 +27,9 @@
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 import logging
+import os
 
-from webkitpy.common.webkit_finder import WebKitFinder
 from webkitpy.layout_tests.breakpad.dump_reader_multipart import DumpReaderLinux
-from webkitpy.layout_tests.models import test_run_results
 from webkitpy.layout_tests.port import base
 from webkitpy.layout_tests.port import win
 
@@ -68,6 +67,9 @@ class LinuxPort(base.Port):
         if not self.get_option('disable_breakpad'):
             self._dump_reader = DumpReaderLinux(host, self._build_path())
 
+        self._original_home = os.environ['HOME']
+        self._dummy_home = None
+
     def additional_driver_flag(self):
         flags = super(LinuxPort, self).additional_driver_flag()
         if not self.get_option('disable_breakpad'):
@@ -104,10 +106,36 @@ class LinuxPort(base.Port):
         _log.error("Could not find apache. Not installed or unknown path.")
         return None
 
+    def setup_test_run(self):
+        super(LinuxPort, self).setup_test_run()
+        self._setup_dummy_home_dir()
+
+    def clean_up_test_run(self):
+        super(LinuxPort, self).clean_up_test_run()
+        self._clean_up_dummy_home_dir()
+
     #
     # PROTECTED METHODS
     #
 
+    def _setup_dummy_home_dir(self):
+        """Creates a dummy home directory for running the test.
+
+        This is a workaround for crbug.com/595504; see crbug.com/612730.
+        """
+        self._dummy_home = self._filesystem.mkdtemp()
+        os.environ['HOME'] = str(self._dummy_home)
+        self._filesystem.copyfile(
+            self._filesystem.join(self._original_home, '.Xauthority'),
+            self._filesystem.join(str(self._dummy_home), '.Xauthority'))

[qyearsley, 2016/07/14 00:00:38]

I'm not actually entirely sure whether it's necessary to copy this file over, or
whether there are any other files that would be good to copy over.

+
+    def _clean_up_dummy_home_dir(self):
+        """Cleans up the dummy dir and resets the HOME environment variable."""
+        dummy_home = os.environ['HOME']
+        assert dummy_home != self._original_home
+        self._filesystem.rmtree(dummy_home)
+        os.environ['HOME'] = self._original_home
+
     def _check_apache_install(self):
         result = self._check_file_exists(self.path_to_apache(), "apache2")
         result = self._check_file_exists(self.path_to_apache_config_file(), "apache2 config file") and result