Tests the coverage list view after suspending the coverage model.

Initial
.../devtools/coverage/resources/coverage.js JS (per block) used: 360 unused: 208 total: 568
.../devtools/coverage/resources/highlight-in-source.css CSS used: 67 unused: 142 total: 209
After second session
.../devtools/coverage/resources/coverage.js JS (per block) used: 360 unused: 208 total: 568
.../devtools/coverage/resources/highlight-in-source.css CSS used: 67 unused: 142 total: 209
After clear
.../devtools/coverage/resources/highlight-in-source.css CSS used: 67 unused: 142 total: 209