Pepper: Remove program_url in trusted plugin.

This reduces the amount of state in the trusted plugin (slightly).

BUG=239656

Review URL: https://codereview.chromium.org/367153004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@281127 0039d316-1c4b-4281-b951-d872f2087c98
8 files changed