Revert 272211 "Allow high-res bitmaps to be passed in from notif..."

Revert 272211 "Allow high-res bitmaps to be passed in from notif..."

Caused test failure in NotificationsCustomBindingsTest.TestGetUrlSpecs

> Allow high-res bitmaps to be passed in from notifications API.
> 
> Previously the custom binding in JS would prevent an image that's larger
> than the size of the template from being sent to the browser process.
> This relaxes the maximum to be the largest supported scale factor of the machine.
> 
> BUG=239676
> 
> Review URL: https://codereview.chromium.org/256503004

TBR=dewittj@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=272270

[Michael Courage, 2014-05-22 19:28:50]

Committed patchset #1 manually as r272270 (tree was closed).