[android] Additional logging to collect more data about why files are being pushed.

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 844 matching lines @@
     assert os.path.exists(host_path), 'Local path not found %s' % host_path
 
     def GetHostSize(path):
       return int(cmd_helper.GetCmdOutput(['du', '-sb', path]).split()[0])
 
     size = GetHostSize(host_path)
     self._pushed_files.append(device_path)
     self._potential_push_size += size
 
     changed_files = self.GetFilesChanged(host_path, device_path)
+    logging.info('Found %d files that need to be pushed to %s',
+        len(changed_files), device_path)
     if not changed_files:
       return
 
     def Push(host, device):
       # NOTE: We can't use adb_interface.Push() because it hardcodes a timeout
       # of 60 seconds which isn't sufficient for a lot of users of this method.
       push_command = 'push %s %s' % (host, device)
       self._LogShell(push_command)
 
       # Retry push with increasing backoff if the device is busy.
@@ skipping 671 matching lines @@
   """
   def __init__(self, output):
     self._output = output
 
   def write(self, data):
     data = data.replace('\r\r\n', '\n')
     self._output.write(data)
 
   def flush(self):
     self._output.flush()