Updates the message in the HDCP verification dialog.

BUG=314752
R=ddorwin
TEST=none

Review URL: https://codereview.chromium.org/102743002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@238627 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 238627
Remove WGC3DCBImpl::GetContextID() and GetChannelID()

One is unused, the other is constant and can be retrieved from
BrowserGpuChannelHostFactory instead.

The goal is to avoid creating a context until the GPU channel is ready.

BUG=270179

Review URL: https://codereview.chromium.org/102903003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@238628 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 238628