Steps
- `google3/video/widevine/export$ find . -type f -name "*.cc" -exec sed -i -E 's/^using ([a-zA-Z]+)/using ::\1/g' {} +`
- `google3/video/widevine/export$ find . -type f -name "*.h" -exec sed -i -E 's/^using ([a-zA-Z]+)/using ::\1/g' {} +`
- Review and revert changes to some files
PiperOrigin-RevId: 584441667
Change-Id: I90b23801b804d3975ac99eb62e6307918175f503