Bug 817700 - Make <canvas>.toBlob run asynchronously. r=seth,roc
Bug 817700 - Make <canvas>.toBlob run asynchronously - canvas changes. r=roc
Bug 817700 - Fix test_mozGetAsFile canvas test. r=roc
Bug 817700 - Fix test_toBlob canvas test. r=roc
Bug 817700 - Fix animSVGImage test. r=roc