Adding App, AndroidApp, AppBackend, AndroidAppBackend, PossibleApp.

tools/telemetry/telemetry/core/possible_app.py

Index: tools/telemetry/telemetry/core/possible_app.py
diff --git a/tools/telemetry/telemetry/core/possible_app.py b/tools/telemetry/telemetry/core/possible_app.py
new file mode 100644
index 0000000000000000000000000000000000000000..63bdb8f0ec524c84eef9e68ab155c16d8ad63e28
--- /dev/null
+++ b/tools/telemetry/telemetry/core/possible_app.py
@@ -0,0 +1,48 @@
+# Copyright 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.
+
+
+class PossibleApp(object):
+  """A factory class that can be used to create a running instance of app.
+
+  Call Create() to launch the app and begin manipulating it.
+  """
+
+  def __init__(self, app_type, target_os, finder_options):
+    self._app_type = app_type
+    self._target_os = target_os
+    self._finder_options = finder_options
+    self._platform = None
+    self._platform_backend = None
+
+  def __repr__(self):
+    return 'PossibleApp(app_type=%s)' % self.app_type
+
+  @property
+  def app_type(self):
+    return self._app_type
+
+  @property
+  def target_os(self):
+    """Target OS, the app will run on."""
+    return self._target_os
+
+  @property
+  def finder_options(self):
+    return self._finder_options
+
+  @property
+  def platform(self):
+    self._InitPlatformIfNeeded()
+    return self._platform
+
+  def _InitPlatformIfNeeded(self):
+    raise NotImplementedError()
+
+  def Create(self):
+    raise NotImplementedError()
+
+  def SupportsOptions(self, finder_options):
+    """Tests for extension support."""
+    raise NotImplementedError()