Don't populate URL data in WebDropData when dragging files.

This is considered a potential security issue as well, since it leaks
filesystem paths.

BUG=332579

Review URL: https://codereview.chromium.org/135633002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@244538 0039d316-1c4b-4281-b951-d872f2087c98
int stacked_tab_right_clip() {
  static int value = -1;
  if (value == -1) {
    switch (ui::GetDisplayLayout()) {
      case ui::LAYOUT_DESKTOP:
        value = 20;
        break;
      case ui::LAYOUT_TOUCH:
        value = 26;
        break;
      default:
        NOTREACHED();
    }
  }
  return value;
}

int stacked_tab_right_clip() {
  static int value = -1;
  if (value == -1) {
    switch (ui::GetDisplayLayout()) {
      case ui::LAYOUT_DESKTOP:
        value = 20;
        break;
      case ui::LAYOUT_TOUCH:
        value = 26;
        break;
      default:
        NOTREACHED();
    }
  }
  return value;
}
