Bug 1073712 - Include prprf.h in WebMReader. r=cpearce
Bug 1073652 - Baseline-compile JSOP_THROWING. r=bhackett
Bug 909389 - Remove --ion-compile-try-catch shell flag. r=djvj
Bug 1046751 - Assert the frontend does not leave pending exceptions. r=jorendorff
Bug 1073698 - fix logic error in previous patch;r=davehunt