[chromedriver] Added option to make element references W3C compliant.

chrome/test/chromedriver/window_commands.cc

Index: chrome/test/chromedriver/window_commands.cc
diff --git a/chrome/test/chromedriver/window_commands.cc b/chrome/test/chromedriver/window_commands.cc
index 6fd252408a35e500d54cd2b5cf73df98ef1bc343..81a6fa1e4040e0ac400339da0d635b871a9a10c5 100644
--- a/chrome/test/chromedriver/window_commands.cc
+++ b/chrome/test/chromedriver/window_commands.cc
@@ -857,7 +857,8 @@ Status ExecuteScreenshot(Session* session,
   status = session->chrome->GetAsDesktop(&desktop);
   if (status.IsOk() && !session->force_devtools_screenshot) {
     AutomationExtension* extension = NULL;
-    status = desktop->GetAutomationExtension(&extension);
+    status = desktop->GetAutomationExtension(&extension,
+                                             session->w3c_compliant);
     if (status.IsError())
       return status;
     status = extension->CaptureScreenshot(&screenshot);