Call didAccessInitialDocument when javascript: URLs are used.

BUG=265221
TEST=See bug for repro.

Review URL: https://chromiumcodereview.appspot.com/22572004

git-svn-id: svn://svn.chromium.org/blink/trunk@155790 bbb929c8-8fbe-4397-9dbb-9b2b20218538
static std::string selectionAsString(WebFrame* frame)
{
    return std::string(frame->selectionAsText().utf8().data());
}

static std::string selectionAsString(WebFrame* frame)
{
    return std::string(frame->selectionAsText().utf8().data());
}
