Bug 22466: REGRESSION (35867): Many resources missing when saving webarchive...

    Bug 22466: REGRESSION (35867): Many resources missing when saving webarchive of webkit.org

        <https://bugs.webkit.org/show_bug.cgi?id=22466>
        <rdar://problem/6403593>

        Reviewed by Brady Eidson.

WebCore:

        Test: http/tests/webarchive/test-preload-resources.html

        * loader/archive/cf/LegacyWebArchive.cpp:
        (WebCore::LegacyWebArchive::create): Check the WebCore cache for
        resources if DocumentLoader::subresource() doesn't return them.
        Note that the DocumentLoader::subresource() method returned
        preloaded resources before r35867, but this caused a regression in
        Mail.

WebKitTools:

        * DumpRenderTree/mac/DumpRenderTree.mm:
        (normalizeHTTPResponseHeaderFields): Added.  Normalizes Date, Etag,
        Keep-Alive, Last-Modified and Server header fields to prevent false
        positive test failures.
        (convertWebResourceResponseToDictionary): Call
        normalizeHTTPResponseHeaderFields() to noramlize HTTP response
        header fields.

LayoutTests:

        * http/tests/webarchive/resources/test-preload-resources.css: Added.
        * http/tests/webarchive/test-preload-resources-expected.webarchive: Added.
        * http/tests/webarchive/test-preload-resources.html: Added.
        * platform/qt/Skipped: Added http/tests/webarchive and grouped the
        skipped list of other webarchive tests together.
        * platform/win/Skipped: Added http/tests/webarchive.

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@38884 268f45cc-cd09-0410-ab3c-d52691b4dbfc