
Catch IE browser exception when reading document.activeElement inside
an iframe.

R=eae
DELTA=10  (8 added, 0 deleted, 2 changed)


Revision created by MOE tool push_codebase.
MOE_MIGRATION=1037


git-svn-id: 35241bd708fe29f1f6c7a4322d322e99ff93b95e@800 0b95b8e8-c90f-11de-9d4f-f947ee5921c8

mdavid/closure-library,mdavid/closure-library,mdavid/closure-library