Android: uses a fifo rather than logcat for the test runner.

build/android/pylib/android_commands.py

 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 """Provides an interface to communicate with the device via the adb command.
 
 Assumes adb binary is currently on system path.
 """
 
 import collections
@@ skipping 966 matching lines @@
           # Column 0 is the executable name
           # Column 1 is the pid
           # Column 8 is the Inode in use
           if process_results[8] == socket_name:
             pids.append((int(process_results[1]), process_results[0]))
         break
     logging.info('PidsUsingDevicePort: %s', pids)
     return pids
 
   def FileExistsOnDevice(self, file_name):
-    """Checks whether the given (regular) file exists on the device.
+    """Checks whether the given file exists on the device.
 
     Args:
       file_name: Full path of file to check.
 
     Returns:
       True if the file exists, False otherwise.
     """
     assert '"' not in file_name, 'file_name cannot contain double quotes'
     status = self._adb.SendShellCommand(
-        '\'test -f "%s"; echo $?\'' % (file_name))
+        '\'test -e "%s"; echo $?\'' % (file_name))
     if 'test: not found' not in status:
       return int(status) == 0
 
     status = self._adb.SendShellCommand(
         '\'ls "%s" >/dev/null 2>&1; echo $?\'' % (file_name))
     return int(status) == 0