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
void HomePageUndoBubble::LinkClicked(views::Link* source, int event_flags) {
  PrefService* prefs = user_prefs::UserPrefs::Get(browser_->profile());
  prefs->SetBoolean(prefs::kHomePageIsNewTabPage, undo_value_is_ntp_);
  prefs->SetString(prefs::kHomePage, undo_url_.spec());

  HideBubble();
}

void HomePageUndoBubble::LinkClicked(views::Link* source, int event_flags) {
  PrefService* prefs = user_prefs::UserPrefs::Get(browser_->profile());
  prefs->SetBoolean(prefs::kHomePageIsNewTabPage, undo_value_is_ntp_);
  prefs->SetString(prefs::kHomePage, undo_url_.spec());

  HideBubble();
}
