Bug 867844 part 1.  Fix rooting hazards in LegacyCall.  r=smaug
Bug 867844 part 2.  Fix remaining rooting hazards in nsFrameMessageManager.cpp.  r=smaug
Bug 867844 part 3.  Fix rooting issues in canvas 2d code.  r=smaug
Bug 868765.  Make the jsid constructor for nsDependentJSString take a Handle.  r=ms2ger
Bug 868448.  Fix the successCode in dictionary to-js conversions to actually work right, and document the requirements on successCode better.  r=smaug