Updated GCM for Chrome docs
This is based on feedback from Adam Feldman and Jed Hartman.
Adam requested that Terms of Service be formatted as the norm for Google APIs. Jed gave lots of excellent feedback to make the docs look and read better.
I've actioned all the feedback with the exception of improvments Jed suggested to make to the generated API client reference.
Since this stuff is generated across all the docs, instead of making big css changes globally, I've added his review comments to the list of changes that we want to make to across the docs UI. The API reference is getting a clean-up, so seems like the right time to make these changes.
Review URL: https://codereview.chromium.org/
12104003
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@180148 0039d316-1c4b-4281-b951-d872f2087c98