It supports alternative names for Chrome such as chromium, as well as
extra names to look for like headless-shell.
Also swap the os.Getenv logic, so that we only do the exec.LookPath work
if the env var is unset.
1. Changes travis configuration to use the chrome addon
2. Adds more command line options to runner package
3. Removes grab-headless_shell.sh script
4. Cleans up and adds some environment variables for controlling how
unit tests are ran
5. Fixes a minor issue in chromedp-gen on comment output (for working
with latest protocol definition)
- Refactored chromedp-gen and cdp code so that Execute no longer returns
a channel
- Fixing potential race problems in handler
- Eliminated some dead code
- Updated examples to include new logging parameters
- Refactored API calls to be cleaner
- Changed types that shoudn't be exported to not-exported
- Updated examples with API changes
- Added unit test for Title action
