We have a small React component that we are attempting to load in our lighting component using a `lightning:container`.  We have uploaded the bundled component zip and are attempting to load it in the lighting component:

<lightning:container aura:id="customComp" src="{!$Resource.customComp + '/index.html'}" />

When the component is rendered, the follow error is shown in the browser console:
 

Refused to display ... in frame because it set X-Frame-Options to 'sameorigin'.

I have attempted to alter the `manifest.json` file in the packaged React Component, but no matter what I set, it does not change the `sandbox` attribute on the rendered `iframe` element. 

We are attempting to resize a image file captured from a mobile device prior to sending to the service to eventually upload to S3.  This was working prior to upgrading the component to API veriosn 40.0.

Component markup:
 

<input id="{!v.name}" 
       type="file" 
       accept="image/*" 
       style="display:none" 
       onchange="{!c.setPhoto}" 
       capture="'environment"/>

Lightning Controller:
 

setPhoto: function (cmp, evt, hlp) {
        if (evt.currentTarget.files) {
            var file = evt.currentTarget.files[0];
            hlp.callImageSelected(cmp, file);
        }
    }

Helper:
 

callImageSelected: function (cmp, file) {
        var canvas = document.createElement('canvas');
        var ctx = canvas.getContext('2d');
        var image = document.createElement('img');

        image.onload = function () {
            var max_size = 600;
            var width = image.width;
            var height = image.height;

            if ((width > height) && (width > max_size)) {
                height *= max_size / width;
                width = max_size;
            } else if (height > max_size) {
                width *= max_size / height;
                height = max_size;
            }

            canvas.width = width;
            canvas.height = height;

            ctx.drawImage(image, 0, 0, width, height);

            var dataUrl = canvas.toDataURL('image/jpeg');
            var imageData = self.dataURLToBlob(dataUrl);

            var imageSelected = cmp.getEvent('imageSelected');
            imageSelected.setParams({
                imageData: imageData,
                imageType: cmp.get('v.imageType')
            });
            imageSelected.fire();
        };

        image.src = URL.createObjectURL(file);
    },

    dataURLToBlob: function (dataURL) {
        var BASE64_MARKER = ';base64,';
        var parts, contentType, raw;
        if (dataURL.indexOf(BASE64_MARKER) == -1) {
            parts = dataURL.split(',');
            contentType = parts[0].split(':')[1];
            raw = parts[1];

            return new Blob([raw], {type: contentType});
        }

        parts = dataURL.split(BASE64_MARKER);
        contentType = parts[0].split(':')[1];
        raw = window.atob(parts[1]);

        var rawLength = raw.length;
        var uInt8Array = new Uint8Array(rawLength);

        _.times(rawLength, function (i) {
            uInt8Array[i] = raw.charCodeAt(i)
        });

        return new Blob([uInt8Array], {type: contentType});
    }

​When we attempt to draw the image to the Canvas context in the helper, it fails with the message:

"Uncaught TypeError: Failed to execute 'drawImage' on 'CanvasRenderingContext2D': The provided value is not of type '(CSSImageValue or HTMLImageElement or HTMLVideoElement or HTMLCanvasElement or ImageBitmap or OffscreenCanvas)'"

I am assuming the issue is that the Context object cannot unwrap the proxied HTMLImageElement.
 

We are attempting to resize a image file captured from a mobile device prior to sending to the service to eventually upload to S3.  This was working prior to upgrading the component to API veriosn 40.0.

Component markup:
 

<input id="{!v.name}" 
       type="file" 
       accept="image/*" 
       style="display:none" 
       onchange="{!c.setPhoto}" 
       capture="'environment"/>

Lightning Controller:
 

setPhoto: function (cmp, evt, hlp) {
        if (evt.currentTarget.files) {
            var file = evt.currentTarget.files[0];
            hlp.callImageSelected(cmp, file);
        }
    }

Helper:
 

callImageSelected: function (cmp, file) {
        var canvas = document.createElement('canvas');
        var ctx = canvas.getContext('2d');
        var image = document.createElement('img');

        image.onload = function () {
            var max_size = 600;
            var width = image.width;
            var height = image.height;

            if ((width > height) && (width > max_size)) {
                height *= max_size / width;
                width = max_size;
            } else if (height > max_size) {
                width *= max_size / height;
                height = max_size;
            }

            canvas.width = width;
            canvas.height = height;

            ctx.drawImage(image, 0, 0, width, height);

            var dataUrl = canvas.toDataURL('image/jpeg');
            var imageData = self.dataURLToBlob(dataUrl);

            var imageSelected = cmp.getEvent('imageSelected');
            imageSelected.setParams({
                imageData: imageData,
                imageType: cmp.get('v.imageType')
            });
            imageSelected.fire();
        };

        image.src = URL.createObjectURL(file);
    },

    dataURLToBlob: function (dataURL) {
        var BASE64_MARKER = ';base64,';
        var parts, contentType, raw;
        if (dataURL.indexOf(BASE64_MARKER) == -1) {
            parts = dataURL.split(',');
            contentType = parts[0].split(':')[1];
            raw = parts[1];

            return new Blob([raw], {type: contentType});
        }

        parts = dataURL.split(BASE64_MARKER);
        contentType = parts[0].split(':')[1];
        raw = window.atob(parts[1]);

        var rawLength = raw.length;
        var uInt8Array = new Uint8Array(rawLength);

        _.times(rawLength, function (i) {
            uInt8Array[i] = raw.charCodeAt(i)
        });

        return new Blob([uInt8Array], {type: contentType});
    }

​When we attempt to draw the image to the Canvas context in the helper, it fails with the message:

"Uncaught TypeError: Failed to execute 'drawImage' on 'CanvasRenderingContext2D': The provided value is not of type '(CSSImageValue or HTMLImageElement or HTMLVideoElement or HTMLCanvasElement or ImageBitmap or OffscreenCanvas)'"

I am assuming the issue is that the Context object cannot unwrap the proxied HTMLImageElement.