Copy the SVG file into front_end/Images/src, using hyphen-case, ideally just take the name that the icon has in the Material icon set.
Add respective entries to .gni files.
devtools_image_files list in config/gni/devtools_image_files.gni.grd_files_bundled_sources list in config/gni/devtools_grd_files.gni.Use Icon component in the DevTools front-end: