Unofficial gardening. Add some flaky expectations for svg/batik tests.

BUG=258991
TBR=dimich

Review URL: https://codereview.chromium.org/19013002

git-svn-id: svn://svn.chromium.org/blink/trunk@153918 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Auto-rebaseline for 153862, 153902

http://src.chromium.org/viewvc/blink?view=revision&revision=153862
http://src.chromium.org/viewvc/blink?view=revision&revision=153902

BUG=258602,243477
TBR=jochen@chromium.org,senorblanco@chromium.org

Review URL: https://codereview.chromium.org/19014002

git-svn-id: svn://svn.chromium.org/blink/trunk@153919 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Unofficial gardening. Mark another virtual/threaded test as flaky. Mark some worker tests as Slow.

BUG=248938
TBR=dimich

Review URL: https://codereview.chromium.org/18112021

git-svn-id: svn://svn.chromium.org/blink/trunk@153920 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Revert "Remove Image::filenameExtension and related methods; there are no remaining uses of this."

This reverts commit r153680.

ImageDecoder::filenameExtension() is now needed by deferred image decoding
to identify the type of decoder created from raw data.

TBR=jbroman@chromium.org
BUG=169377

Review URL: https://codereview.chromium.org/18600011

git-svn-id: svn://svn.chromium.org/blink/trunk@153921 bbb929c8-8fbe-4397-9dbb-9b2b20218538