Round width and height browser reported values.

[igneel64]

Is your feature request related to a problem? Please describe.
In some cases e.g. subpixel rendering browsers might report fractional values for width and height dimensions of the document and/or window.

This might create issues on the reporting of these values (e.g. errors in the pipeline) without providing any significant meaning that we can extract insight from. To fix this, we can select to round up/down to the closest integer.