Could you please elaborate more on the issue, as per the example tried the same on chrome version 53.0.2760.0 and observed the following as displayed in the screen shot.

Thanks.!

Deleted: Screen Shot 2016-06-06 at 12.47.59 PM.png 265 KB

	Screen Shot 2016-06-06 at 12.47.59 PM.png 265 KB View Download

@ranjitkan see https://bugs.chromium.org/p/chromium/issues/detail?id=540528#c52 Dev team will look into this issue.

Thanks for the update, adding appropriate label.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/fe5355eb33ecae91d4b92554a627a2677b7fbae9

commit fe5355eb33ecae91d4b92554a627a2677b7fbae9
Author: szager <szager@chromium.org>
Date: Wed Jun 08 19:28:58 2016

IntersectionObserver: throw exceptions as spec mandates.

BUG= 617396 
R=eae@chromium.org,ikilpatrick@chromium.org

Review-Url: https://codereview.chromium.org/2046973003
Cr-Commit-Position: refs/heads/master@{#398640}

[modify] https://crrev.com/fe5355eb33ecae91d4b92554a627a2677b7fbae9/third_party/WebKit/LayoutTests/intersection-observer/observer-exceptions-expected.txt
[modify] https://crrev.com/fe5355eb33ecae91d4b92554a627a2677b7fbae9/third_party/WebKit/LayoutTests/intersection-observer/observer-exceptions.html
[modify] https://crrev.com/fe5355eb33ecae91d4b92554a627a2677b7fbae9/third_party/WebKit/Source/core/dom/IntersectionObserver.cpp
[modify] https://crrev.com/fe5355eb33ecae91d4b92554a627a2677b7fbae9/third_party/WebKit/Source/core/dom/IntersectionObserver.h
[modify] https://crrev.com/fe5355eb33ecae91d4b92554a627a2677b7fbae9/third_party/WebKit/Source/core/dom/IntersectionObserver.idl
[modify] https://crrev.com/fe5355eb33ecae91d4b92554a627a2677b7fbae9/third_party/WebKit/Source/web/tests/IntersectionObserverTest.cpp

Is this bug fixed with that checkin?