Make sure snap_page combined iframe serialized dom

telemetry/telemetry/internal/browser/web_contents.py

Index: telemetry/telemetry/internal/browser/web_contents.py
diff --git a/telemetry/telemetry/internal/browser/web_contents.py b/telemetry/telemetry/internal/browser/web_contents.py
index f4669f3d9a88013fe45493d9518656e3d12298f6..542c976cbfee3974d00ef44eea765bdb5770cbc9 100644
--- a/telemetry/telemetry/internal/browser/web_contents.py
+++ b/telemetry/telemetry/internal/browser/web_contents.py
@@ -239,7 +239,13 @@ class WebContents(object):
     return self._inspector_backend.WaitForJavaScriptCondition(*args, **kwargs)
 
   def EnableAllContexts(self):
-    """Enable all contexts in a page. Returns the number of available contexts.
+    """Enable all contexts in a page. Returns all available context ids.
+
+    Returns:
+      A list of frame context ids. Each |context_id| can be used for
+      executing Javascript in the corresponding iframe through
+      tab.ExecuteJavaScript(..., context_id=context_id) and
+      ab.EvaluateJavaScript(..., context_id=context_id).

[wkorman, 2017/09/20 20:11:04]

Missing 't'

 
     Raises:
       exceptions.WebSocketDisconnected