Revert 154701 "Fix build breakage from missing #include"

> Fix build breakage from missing #include
> 
> fix compile error caused by 154697
> 
> TBR=crogers@google.com
> 
> Review URL: https://codereview.chromium.org/19872006

TBR=crogers@google.com

Review URL: https://codereview.chromium.org/20018002

git-svn-id: svn://svn.chromium.org/blink/trunk@154702 bbb929c8-8fbe-4397-9dbb-9b2b20218538