GitLab

Also re-factored the recently landed Debugger api (I believe it's the only API to have compiled events, so far)

BUG=138767


Review URL: https://chromiumcodereview.appspot.com/10796114

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@148878 0039d316-1c4b-4281-b951-d872f2087c98