Fix for testing existence of oobe in login code.

tools/telemetry/telemetry/core/backends/chrome/misc_web_contents_backend.py

Index: tools/telemetry/telemetry/core/backends/chrome/misc_web_contents_backend.py
diff --git a/tools/telemetry/telemetry/core/backends/chrome/misc_web_contents_backend.py b/tools/telemetry/telemetry/core/backends/chrome/misc_web_contents_backend.py
index 891366b2643e766324285d4465124964967e7117..b0f7b580714dd80c9010e46c8bce1705d2c1a6c6 100644
--- a/tools/telemetry/telemetry/core/backends/chrome/misc_web_contents_backend.py
+++ b/tools/telemetry/telemetry/core/backends/chrome/misc_web_contents_backend.py
@@ -13,6 +13,9 @@ class MiscWebContentsBackend(object):
   def __init__(self, browser_backend):
     self._browser_backend = browser_backend
 
+  def OobeExists(self):
+    return bool(self._FindWebContentsInfo())
+
   def GetOobe(self):
     oobe_web_contents_info = self._FindWebContentsInfo()
     if oobe_web_contents_info: