Support fetching attribute listeners from outside v8 context scopes.
A number of the <body> element's event handler attributes represent
and expose event handlers on the window object, hence the parser
will update & replace attribute event listeners while parsing the
attributes. This may well happen while executing outside any v8
context; adjust the lookup of attribute event listeners
to support such usage.
R=haraken
BUG=659911
Review-Url: https://codereview.chromium.org/2492793002
Cr-Commit-Position: refs/heads/master@{#431509}
7 files changed
