Fixed a displacement issue

The displacement filter was assuming that both inputs were of the same size, which is true in blink, but not necessarily in a compromised stream.

BUG=327372
R=senorblanco@chromium.org, senorblanco@google.com, reed@google.com, fmalita@chromium.org, fmalita@google.com, sugoi@google.com

Author: sugoi@chromium.org

Review URL: https://codereview.chromium.org/101623007

git-svn-id: http://skia.googlecode.com/svn/trunk/src@12655 2bbb7eff-a529-9590-31e7-b0007b416f81
1 file changed