Rename corner -> shape in tests

[kfranqueiro]

Note: This is based on #3552, so review after that's merged. (I'm running it against feat/shape so it runs screenshot tests.)

[codecov-io]

Codecov Report

Merging #3622 into feat/shape will decrease coverage by 0.02%.
The diff coverage is n/a.

@@              Coverage Diff               @@
##           feat/shape    #3622      +/-   ##
==============================================
- Coverage       98.43%   98.41%   -0.03%     
==============================================
  Files             120      120              
  Lines            5192     5036     -156     
  Branches          649      620      -29     
==============================================
- Hits             5111     4956     -155     
+ Misses             81       80       -1

Impacted Files	Coverage Δ
packages/mdc-list/foundation.js	99.12% <0%> (-0.06%)	⬇️
packages/mdc-textfield/foundation.js	98.93% <0%> (-0.05%)	⬇️
packages/mdc-list/index.js	100% <0%> (ø)	⬆️
packages/mdc-menu/foundation.js	100% <0%> (ø)	⬆️
packages/mdc-ripple/foundation.js	100% <0%> (ø)	⬆️
packages/mdc-menu/index.js	100% <0%> (ø)	⬆️
packages/mdc-dialog/constants.js	100% <0%> (ø)	⬆️
packages/mdc-dialog/foundation.js	100% <0%> (ø)	⬆️
packages/mdc-dom/ponyfill.js	100% <0%> (ø)	⬆️
packages/mdc-dialog/index.js	100% <0%> (ø)	⬆️
... and 5 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update a40fe2c...cbbcb27. Read the comment docs.

[mdc-web-bot]

🤖 Beep boop!

Screenshot test report 🚦

21 screenshots changed from feat/shape on commit cbbcb27:

• https://storage.googleapis.com/mdc-web-screenshot-tests/travis/2018/09/24/18_07_52_828/report/report.html?utm_source=github&utm_content=pr_comment

Details

5 Changed:

• spec/mdc-card/mixins/mixins.html
• spec/mdc-dialog/mixins/shape-radius.html

16 Added:

• spec/mdc-chips/mixins/shape-radius.html

• spec/mdc-image-list/mixins/standard-shape-radius.html

• spec/mdc-image-list/mixins/standard-with-text-protection-shape-radius.html

• spec/mdc-select/mixins/shape-radius.html