LeakExpectations: reassign a svg leak as a selection leak

The cause of the leak seems to be same as http://crbug.com/364417 .
The test uses selection and edit commands, and commenting out those makes
the leak disappear.

bonus: sort the LeakExpectations entries

NOTRY=true
BUG=364416,364417

Review URL: https://codereview.chromium.org/351773003

git-svn-id: svn://svn.chromium.org/blink/trunk@176807 bbb929c8-8fbe-4397-9dbb-9b2b20218538