[chrome-remote-control] Interaction objects separate measurement/test code from page scrolling/drag…

tools/chrome_remote_control/chrome_remote_control/page_test.py

Index: tools/chrome_remote_control/chrome_remote_control/page_test.py
diff --git a/tools/chrome_remote_control/chrome_remote_control/page_test.py b/tools/chrome_remote_control/chrome_remote_control/page_test.py
index 2d4d24fd97c3b1a19e3634133523b2da57fd9db8..f92b618887d2879e86ffd95b40efb0ec5ca1e0b3 100644
--- a/tools/chrome_remote_control/chrome_remote_control/page_test.py
+++ b/tools/chrome_remote_control/chrome_remote_control/page_test.py
@@ -42,6 +42,14 @@ class PageTest(object):
     """Override to customize the browser right after it has launched."""
     pass
 
+  def WillPerformInteraction(self, interaction, page, tab):
+    """Override to interact with the tab before the interaction runs."""
+    pass
+
+  def DidPerformInteraction(self, interaction, page, tab):
+    """Override to interact with the tab after the interaction runs."""
+    pass
+
   def Run(self, options, page, tab, results):
     self.options = options
     try: