Chrome remote control multipage tests: Add interactions.

tools/chrome_remote_control/chrome_remote_control/page_interaction.py

Index: tools/chrome_remote_control/chrome_remote_control/page_interaction.py
diff --git a/tools/chrome_remote_control/chrome_remote_control/page_interaction.py b/tools/chrome_remote_control/chrome_remote_control/page_interaction.py
new file mode 100644
index 0000000000000000000000000000000000000000..e77b8f953147ebf96cb728ea5c64b2e5004cdc4d
--- /dev/null
+++ b/tools/chrome_remote_control/chrome_remote_control/page_interaction.py
@@ -0,0 +1,36 @@
+# 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.
+
+class PageInteractionNotSupported(Exception):
+  pass
+
+class PageInteractionFailed(Exception):
+  pass
+
+class PageInteraction(object):
+  """Represents an interaction that a user might try to perform to a page."""
+
+  def CustomizeBrowserOptions(self, options):
+    """Override to add test-specific options to the BrowserOptions object"""
+    pass
+
+  def SupportedForPage(self, page, tab):
+    raise NotImplementedError()
+
+  def PerformInteraction(self, page, tab, test):
+    raise NotImplementedError()
+
+  def CleanUp(self, page, tab):
+    raise NotImplementedError()
+
+_page_interaction_classes = {}
+def GetAllClasses():
+  return list(_page_interaction_classes.values())
+
+def FindClassWithName(name):
+  return _page_interaction_classes.get(name)
+
+def RegisterClass(name, interaction_class):
+  assert name not in _page_interaction_classes
+  _page_interaction_classes[name] = interaction_class