[Android] Move screenshot and video_recorder into devil.

build/android/devil/android/tools/script_common.py

Index: build/android/devil/android/tools/script_common.py
diff --git a/build/android/devil/android/tools/script_common.py b/build/android/devil/android/tools/script_common.py
new file mode 100644
index 0000000000000000000000000000000000000000..eb91cdcb9bffd88db4c9ce4b03df510994a5f449
--- /dev/null
+++ b/build/android/devil/android/tools/script_common.py
@@ -0,0 +1,28 @@
+# Copyright 2015 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.
+
+from devil.android import device_blacklist
+from devil.android import device_errors
+from devil.android import device_utils
+
+
+def GetDevices(requested_devices, blacklist_file):
+  blacklist = (device_blacklist.Blacklist(blacklist_file)
+               if blacklist_file
+               else None)
+
+  devices = device_utils.DeviceUtils.HealthyDevices(blacklist)
+  if not devices:
+    raise device_errors.NoDevicesError()
+  elif requested_devices:
+    requested = set(requested_devices)
+    available = set(str(d) for d in devices)
+    missing = requested.difference(available)
+    if missing:
+      raise device_errors.DeviceUnreachableError(next(iter(missing)))
+    return sorted(device_utils.DeviceUtils(d)
+                  for d in available.intersection(requested))
+  else:
+    return devices
+