Adding App, AndroidApp, AppBackend, AndroidAppBackend, PossibleApp.

tools/telemetry/telemetry/core/app.py

Index: tools/telemetry/telemetry/core/app.py
diff --git a/tools/telemetry/telemetry/core/app.py b/tools/telemetry/telemetry/core/app.py
new file mode 100644
index 0000000000000000000000000000000000000000..35b44d262023c0f1e0ed9c1feae6e467a316cc45
--- /dev/null
+++ b/tools/telemetry/telemetry/core/app.py
@@ -0,0 +1,24 @@
+# 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 App(object):
+  """ A running application instance that can be controlled in a limited way.
+
+  Be sure to clean up after yourself by calling Close() when you are done with
+  the app. Or better yet:
+    with possible_app.Create() as app:
+      ... do all your operations on app here
+  """
+  def __init__(self, app_backend, platform_backend):
+    assert platform_backend.platform != None
+
+    self._app_backend = app_backend
+    self._platform_backend = platform_backend
+
+  @property
+  def platform(self):
+    return self._platform_backend.platform
+
+  def Close(self):
+    raise NotImplementedError()