Bug 945222 - Update web-platform-tests to revision 37399dd8718445cf7399202a807d16cb8b91d13e

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rename : testing/web-platform/tests/XMLHttpRequest/send-non-same-origin.htm => testing/web-platform/tests/XMLHttpRequest/send-non-same-origin.sub.htm
rename : testing/web-platform/tests/html/infrastructure/urls/dynamic-changes-to-base-urls/dynamic-urls.xhtml => testing/web-platform/tests/html/infrastructure/urls/dynamic-changes-to-base-urls/dynamic-urls.sub.xhtml
rename : testing/web-platform/tests/html/semantics/document-metadata/the-base-element/base_href_specified.html => testing/web-platform/tests/html/semantics/document-metadata/the-base-element/base_href_specified.sub.html
rename : testing/web-platform/tests/html/semantics/embedded-content/the-canvas-element/security.pattern.create.html => testing/web-platform/tests/html/semantics/embedded-content/the-canvas-element/security.pattern.create.sub.html
Update to latest wpt harness
A little clean up from code review