Bug 920571 - Followup to copy all the pixel on the last line. r=bustage
Bug 919457: Allow bindings specific to workers without the old-style worker ownership model. r=bz
Bug 919337: Use static_assert in double_conversion::BitCast. r=waldo
Bug 921582: Avoid a 'may be used uninitialized' warning. r=waldo

Specifically:

In file included from ./../../dist/include/js/CallArgs.h:39:0,
                 from ./../../dist/include/js/CallNonGenericMethod.h:12,
                 from /home/jimb/moz/dbg/js/src/NamespaceImports.h:15,
                 from /home/jimb/moz/dbg/js/src/builtin/Intl.h:10,
                 from /home/jimb/moz/dbg/js/src/builtin/Intl.cpp:12:
./../../dist/include/js/Value.h: In function ‘bool js::intl_CompareStrings(JSContext*, unsigned int, JS::Value*)’:
./../../dist/include/js/Value.h:653:58: warning: ‘res’ may be used uninitialized in this function [-Wmaybe-uninitialized]
     JS_RETURN_LAYOUT_FROM_BITS(((uint64_t)(uint32_t)i32) | JSVAL_SHIFTED_TAG_INT32);
                                                          ^
/home/jimb/moz/dbg/js/src/builtin/Intl.cpp:968:13: note: ‘res’ was declared here
     int32_t res;
             ^
Backed out 8 changesets (bug 916267, bug 850430) for mochitest failures