MHTML documents containing references to resources they don't include
never finish loading.
https://bugs.webkit.org/show_bug.cgi?id=71859

Reviewed by Adam Barth.

Source/WebCore:

* loader/DocumentLoader.cpp:
(WebCore::DocumentLoader::scheduleArchiveLoad):

Source/WebKit/chromium:

* tests/FrameTestHelpers.cpp:
(WebKit::FrameTestHelpers::registerMockedURLLoadAsHTML):
(WebKit::FrameTestHelpers::registerMockedURLLoad):
(WebKit::FrameTestHelpers::createWebViewAndLoad):
* tests/FrameTestHelpers.h:
* tests/WebFrameTest.cpp:
(WebKit::WebFrameTest::registerMockedHttpURLLoad):
(WebKit::WebFrameTest::registerMockedChromeURLLoad):
(WebKit::TEST_F):
* tests/WebViewTest.cpp:
(WebKit::TEST_F):
* tests/data/page_with_image.mht: Added.


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@99826 268f45cc-cd09-0410-ab3c-d52691b4dbfc