Convert LayoutTests/fast/canvas/2d tests to testharness.
This patch uses testharness.js asserts to test
2d.text.draw.fill.maxWidth.gradient.html,
2d.text.draw.fill.maxWidth.negative-expected.html.
Remove the expectation files as they are not needed any more.
BUG=
639732
Committed:
https://crrev.com/c8e5feee42203a2441e25c518d9ce06fed879834
Cr-Commit-Position: refs/heads/master@{#414912}