Added layout tests for all shorthand property.

This is a preparation patch for implementing all shorthand property.
This patch adds layout tests, which are currently failing.
After implementing all shorthand correctly, the tests will pass.

Spec: http://dev.w3.org/csswg/css-cascade/#all-shorthand

BUG=172051
TEST=fast/css/all-shorthand-css-text.html,fast/css/all-shorthand.html,fast/css/getComputedStyle/getComputedStyle-all.html

Review URL: https://codereview.chromium.org/335733003

git-svn-id: svn://svn.chromium.org/blink/trunk@176201 bbb929c8-8fbe-4397-9dbb-9b2b20218538