Bug 851630: fix error in patch for bug 758288 that caused improper cancellation of key events in children of autocomplete textboxes, r=dao

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extra : transplant_source : %D2XWZ%B0%21%E6%D5z%3F%26%9D%3E%DD7q%CE%B1%EFE
Bug 862186: remove unused import from DebuggerUI.jsm, r=past

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extra : transplant_source : %27%06U%D8%1C%10%FB%81%E5%00%EBi%2A%27%09%F0%0C%E6%D4%DB
Bug 703377: remove now-unused pref override functionality, r=dolske

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extra : transplant_source : %C1%B65%07%B60XS%AB%DD%EF7Hx%A5%8Cz%11%04%97
bug 862152: remove obsolete xpcom/tests/utils code, r=bsmedberg

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extra : transplant_source : ytT%C26%9B%27d%AB%A4%EA%5E%F3%21%7F%0AV%B9%86%00
Bug 847211: When reparenting style contexts, skip flex-item style fixup if our element is the root of an anonymous subtree. r=bz
Bug 829419 - Don't allow processing pending events while shutting down cache IO thread, r=jduell
Backed out changeset 76f7d7963692 (bug 861912) for debug mochitest b-c orange.