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
    virtual void didFailProvisionalLoad(WebFrame* frame, const WebURLError& error)
    {
        frame->loadHTMLString("This should appear", toKURL("data:text/html,chromewebdata"), error.unreachableURL, true);
        runPendingTasks();
    }

    virtual void didFailProvisionalLoad(WebFrame* frame, const WebURLError& error)
    {
        frame->loadHTMLString("This should appear", toKURL("data:text/html,chromewebdata"), error.unreachableURL, true);
        runPendingTasks();
    }
