visualize.py

Translates a ROI JSON for visualization in Chrome.

This script translates a JSON file, in the format produced by roi.py, to a JSON file adhering to the syntax required by Chrome's Trace-Viewer.

The output can be visualized in a Chrome browser: go to the about:tracing URL and load the JSON file.

This script can be compared to trace/tracevis.py, but instead of visualizing individual instructions, it represents entire execution regions as a whole.