Re-baseline tests that are producing correct/acceptable results on Windows....

webkit/data/layout_tests/platform/chromium-win/LayoutTests/http/tests/xmlhttprequest/cache-override-expected.txt

+Tests for bug 8210 - Conditional XMLHttpRequest gets should pass 304 responses unchanged.
+
+Fetching the resource once to cache the response...
+Automatically cached response body is correct; status = 200
+If-Modified-Since override: status = 304
+If-MODIFIED-Since override: status = 304
+If-Modified-Since override (modified): status = 200
+If-Unmodified-Since override: status = 200
+If-Unmodified-Since override (modified): status = 200
+If-Match override: status = 200
+If-Match override (none match): status = 200
+If-None-Match override: status = 304
+If-None-Match override (none match): status = 200
+If-Range override: status = 206
+If-Range override (none match): status = 200
+If-Modified-Since override (uncached response): status = 304
+async: Automatically cached response body is correct; status = 200
+async: If-Modified-Since override: status = 304
+async: If-Modified-Since override (modified): status = 200
+async: If-Unmodified-Since override: status = 200
+async: If-Unmodified-Since override (modified): status = 200
+async: If-Match override: status = 200
+async: If-Match override (none match): status = 200
+async: If-None-Match override: status = 304
+async: If-None-Match override (none match): status = 200
+async: If-Range override: status = 206
+async: If-Range override (none match): status = 200
+async: If-Modified-Since override (uncached response): status = 304