Fix SDK installer by downloading r20 directly

build/android/emulator.py

 #!/usr/bin/env python
 #
 # 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 start and stop Android emulator.
 
 Assumes system environment ANDROID_NDK_ROOT has been set.
 
   Emulator: The class provides the methods to launch/shutdown the emulator with
-            the android virtual device named 'buildbot' .
+            the android virtual device named 'avd_armeabi' .
 """
 
 import logging
 import os
 import signal
 import subprocess
 import sys
 import time
 
 from pylib import android_commands
@@ skipping 56 matching lines @@
   for emulator in emulators:
     used_ports.append(emulator.split('-')[1])
   for port in PortPool.port_range():
     if str(port) not in used_ports:
       return port
 
 
 class Emulator(object):
   """Provides the methods to lanuch/shutdown the emulator.
 
-  The emulator has the android virtual device named 'buildbot'.
+  The emulator has the android virtual device named 'avd_armeabi'.
 
   The emulator could use any even TCP port between 5554 and 5584 for the
   console communication, and this port will be part of the device name like
   'emulator-5554'. Assume it is always True, as the device name is the id of
   emulator managed in this class.
 
   Attributes:
     emulator: Path of Android's emulator tool.
     popen: Popen object of the running emulator process.
     device: Device name of this emulator.
@@ skipping 49 matching lines @@
       self._AggressiveImageCleanup()
     (self.device, port) = self._DeviceName()
     emulator_command = [
         self.emulator,
         # Speed up emulator launch by 40%.  Really.
         '-no-boot-anim',
         # The default /data size is 64M.
         # That's not enough for 8 unit test bundles and their data.
         '-partition-size', '512',
         # Use a familiar name and port.
-        '-avd', 'buildbot',
+        '-avd', 'avd_armeabi',
         '-port', str(port)]
     if not self.fast_and_loose:
       emulator_command.extend([
           # Wipe the data.  We've seen cases where an emulator
           # gets 'stuck' if we don't do this (every thousand runs or
           # so).
           '-wipe-data',
           ])
     logging.info('Emulator launch command: %s', ' '.join(emulator_command))
     self.popen = subprocess.Popen(args=emulator_command,
@@ skipping 73 matching lines @@
     """Install a handler to kill the emulator when we exit unexpectedly."""
     for sig in self._SIGNALS:
       signal.signal(sig, self._ShutdownOnSignal)
 
 def main(argv):
   Emulator(True).Launch(True)
 
 
 if __name__ == '__main__':
   main(sys.argv)