Enable few more browser tests on coverage bot.
1. src/chrome/browser/nacl_host
2. src/chrome/browser/debugger
3. src/chrome/browser/first_run
4. src/chrome/browser/importer
5. src/chrome/browser/page_cycler
6. src/chrome/browser/performance_monitor
7. src/chrome/browser/prerender

Review URL: https://chromiumcodereview.appspot.com/11475004

Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: 4e6b195b0d96999f783563863dc1e9e0260f6ab0
1 file changed