[Android] Update SendKeyEvent docs to point to constants.keyevent

build/android/pylib/device/device_utils.py

 # Copyright 2014 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 a variety of device interactions based on adb.
 
 Eventually, this will be based on adb_wrapper.
 """
 # pylint: disable=unused-argument
 
@@ skipping 771 matching lines @@
     # may never return.
     if ((self.build_version_sdk >=
          constants.ANDROID_SDK_VERSION_CODES.JELLY_BEAN_MR2)
         or self.GetApplicationPath(package)):
       self.RunShellCommand(['pm', 'clear', package], check_return=True)
 
   @decorators.WithTimeoutAndRetriesFromInstance()
   def SendKeyEvent(self, keycode, timeout=None, retries=None):
     """Sends a keycode to the device.
 
-    See: http://developer.android.com/reference/android/view/KeyEvent.html
+    See the pylib.constants.keyevent module for suitable keycode values.
 
     Args:
       keycode: A integer keycode to send to the device.
       timeout: timeout in seconds
       retries: number of retries
 
     Raises:
       CommandTimeoutError on timeout.
       DeviceUnreachableError on missing device.
     """
@@ skipping 811 matching lines @@
     blacklist = device_blacklist.ReadBlacklist()
     def blacklisted(adb):
       if adb.GetDeviceSerial() in blacklist:
         logging.warning('Device %s is blacklisted.', adb.GetDeviceSerial())
         return True
       return False
 
     return [cls(adb) for adb in adb_wrapper.AdbWrapper.Devices()
             if not blacklisted(adb)]