Android: renames pylib.constants.CHROME_DIR to DIR_SOURCE_ROOT.

build/android/provision_devices.py

Index: build/android/provision_devices.py
diff --git a/build/android/provision_devices.py b/build/android/provision_devices.py
index 66465563fbe18f47585285643ff6af17e2eb484e..15731829aa5aff5facab928f267b98d7f83e9ba8 100755
--- a/build/android/provision_devices.py
+++ b/build/android/provision_devices.py
@@ -31,7 +31,7 @@ def LaunchHostHeartbeat():
     subprocess.call(['kill', str(pid)])
   # Launch a new host_heartbeat
   print 'Spawning host heartbeat...'
-  subprocess.Popen([os.path.join(constants.CHROME_DIR,
+  subprocess.Popen([os.path.join(constants.DIR_SOURCE_ROOT,
                                  'build/android/host_heartbeat.py')])
 
 
@@ -51,7 +51,7 @@ def PushAndLaunchAdbReboot(devices, target):
     android_cmd.KillAllBlocking('adb_reboot', 2)
     # Push adb_reboot
     print '  Pushing adb_reboot ...'
-    adb_reboot = os.path.join(constants.CHROME_DIR,
+    adb_reboot = os.path.join(constants.DIR_SOURCE_ROOT,
                               'out/%s/adb_reboot' % target)
     android_cmd.PushIfNeeded(adb_reboot, '/data/local/')
     # Launch adb_reboot