Fix uninitialized read in unit tests

This CL fixes an uninitialized read in unit tests introduced by
CL 35943002.

BUG=310176
TEST=Manual
TBR=derat@chromium.org

Review URL: https://codereview.chromium.org/49173002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@231344 0039d316-1c4b-4281-b951-d872f2087c98
Remove existing Skia suppressions.

BUG=308500
TBR=robertphillips@google.com

Review URL: https://codereview.chromium.org/47743004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@231345 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 231345
Fixes flaky testInputTypeResponsivenessAsync

BUG=311587

Review URL: https://codereview.chromium.org/41073005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@231346 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 231346