GitLab

These headers have moved from Source/Platform/chromium/public to
public/platform. This CL updates the remaining references to the old location
to point to the new location. After this CL lands, I'll remove the forwarding
headers that are letting these references still work.

TBR=darin@chromium.org
BUG=239545
NOTRY=true

Review URL: https://chromiumcodereview.appspot.com/15648012

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@203106 0039d316-1c4b-4281-b951-d872f2087c98