Fix content script hello word
Fix content script hello word

ali/webpack-chrome-extension,transedward/facebook-marks,ganarajpr/gotofile-chrome,schovi/webpack-chrome-extension,Patte1808/webpack-chrome-extension,schovi/webpack-chrome-extension,transedward/facebook-marks,ganarajpr/gotofile-chrome,zalmoxisus/webpack-chrome-extension,ali/webpack-chrome-extension,zalmoxisus/webpack-chrome-extension,philly-d/chirp-for-twitter,Patte1808/webpack-chrome-extension