Blob constructor browser compatibility

So, these are actually two different problems. The Desktop Chrome warning was a bug in chrome which is fixed since 2013-03-21.

Mobile Chrome is giving you a TypeError because the blob constructor is not supported. Instead you must use the old BlobBuilder API. The BlobBuilder API has browser specific BlobBuilder constructors. This is the case for FF6 – 12, Chrome 8-19, Mobile Chrome, IE10 and Android 3.0-4.2.

var array = new Int8Array([17, -45.3]);

try{
  var jpeg = new Blob( [array], {type : "image/jpeg"});
}
catch(e){
    // TypeError old chrome and FF
    window.BlobBuilder = window.BlobBuilder || 
                         window.WebKitBlobBuilder || 
                         window.MozBlobBuilder || 
                         window.MSBlobBuilder;
    if(e.name == 'TypeError' && window.BlobBuilder){
        var bb = new BlobBuilder();
        bb.append(array.buffer);
        var jpeg = bb.getBlob("image/jpeg");
    }
    else if(e.name == "InvalidStateError"){
        // InvalidStateError (tested on FF13 WinXP)
        var jpeg = new Blob( [array.buffer], {type : "image/jpeg"});
    }
    else{
        // We're screwed, blob constructor unsupported entirely   
    }
}

Fiddle: http://jsfiddle.net/Jz8U3/13/