Auto-rebaseline for r174690

http://src.chromium.org/viewvc/blink?view=revision&revision=174690

BUG=372497
TBR=fmalita@chromium.org

Review URL: https://codereview.chromium.org/299923004

git-svn-id: svn://svn.chromium.org/blink/trunk@174722 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Immediately load parser-created images upon insertedInto, to fix perf regressions.

Spec bug https://www.w3.org/Bugs/Public/show_bug.cgi?id=25848
Suggested spec fix https://github.com/ResponsiveImagesCG/picture-element/pull/179


BUG=372971

Review URL: https://codereview.chromium.org/292183004

git-svn-id: svn://svn.chromium.org/blink/trunk@174723 bbb929c8-8fbe-4397-9dbb-9b2b20218538