This will clear cache data from google chrome on LG Motion.
Steps involved:
1. Open App settings. (by tapping right bottom control of the phone)
2. fine Chrome on already installed apps.
3. tap on chrome. details of chrome will open up.
4. You can see "clear cache" button there. (You might have to roll down on screen a little bit, depends on font size you have chosen.).
5. tap on Clear cache button and cache is gone.

Thanks
Ashish