Create symlink to adb in home dir right before device setup.

scripts/slave/recipe_modules/chromium_android/api.py

 # Copyright 2013 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.
 
 import contextlib
 import datetime
 import json
 import os
 import re
 import urllib
@@ skipping 245 matching lines @@
     # (or at least make the difference clear).
     self.m.archive.zip_and_upload_build(
         'zip_build',
         target=self.m.chromium.c.BUILD_CONFIG,
         # We send None as the path so that zip_build.py gets it from factory
         # properties.
         build_url=None,
         src_dir=self.m.path['slave_build'].join('src'),
         exclude_files='lib.target,gen,android_webview,jingle_unittests')
 
+  def create_adb_symlink(self):
+    # Creates a sym link to the adb executable in the home dir
+    self.m.python(
+        'create adb symlink',
+        self.m.path['checkout'].join('build', 'symlink.py'),
+        ['-f', self.m.adb.adb_path(), os.path.join('~', 'adb')],
+        infra_step=True)
+
   def spawn_logcat_monitor(self):
     self.m.step(
         'spawn_logcat_monitor',
         [self.package_repo_resource('scripts', 'slave', 'daemonizer.py'),
          '--', self.c.cr_build_android.join('adb_logcat_monitor.py'),
          self.m.chromium.c.build_dir.join('logcat')],
         env=self.m.chromium.get_env(),
         infra_step=True)
 
   def spawn_device_monitor(self):
@@ skipping 563 matching lines @@
               os.remove(report)
          """,
          args=[self.m.path['checkout'].join('out',
                                             self.m.chromium.c.BUILD_CONFIG,
                                             'test_logs',
                                             '*.log')],
     )
 
   def common_tests_setup_steps(self, perf_setup=False,
                                remove_system_webview=False):
+    self.create_adb_symlink()
     if self.c.gce_setup:
       self.launch_gce_instances(snapshot=self.c.gce_snapshot, count=self.c.gce_count)
       self.spawn_logcat_monitor()
       self.provision_devices(emulators=True,
                              remove_system_webview=remove_system_webview)
     else:
       self.spawn_logcat_monitor()
       self.authorize_adb_devices()
       self.device_status_check()
       if perf_setup:
@@ skipping 380 matching lines @@
   def test_runner(self, step_name, args=None, **kwargs):
     """Wrapper for the python testrunner script.
 
     Args:
       step_name: Name of the step.
       args: Testrunner arguments.
     """
     with self.handle_exit_codes():
       return self.m.python(
           step_name, self.c.test_runner, args, **kwargs)