Remove dead code for dragging MediaControlPanelElement

Because setCanBeDragged(true) is never called, all the rest of the
dragging code becomes unreachable. The feature as such looks useful, but
it would require fixing and above all testing to interact well with text
track rendering.

BUG=341813
TEST=LayoutTests/media/ still passes, i.e. there were none!

Review URL: https://codereview.chromium.org/196533020

git-svn-id: svn://svn.chromium.org/blink/trunk@169606 bbb929c8-8fbe-4397-9dbb-9b2b20218538
2 files changed
tree: 01cfc9f317ed226e5b0a3bbc6cd2acddcb5fe0e3
  1. third_party/