[ChromeDriver] Make some mouse web platform tests work on wpt serve

I have changed ExecutePerformActions function in window_commands.cc to
execute the actions input sent from Webdriver and convert an element
in origin into coordinates.

Bug:chromedriver:1897
Change-Id: I407dbad5e001f15ddd4edfd709f5460384e95530

infrastructure/metadata/infrastructure/testdriver/actions/elementPosition.html.ini

@@ -1,3 +1,3 @@
 [elementPosition.html]
   expected:
-    if product == "chrome" or product == "safari": ERROR
+    if product == "safari": ERROR