question: public static String locateChrome ( ) { String os = Platform . getOS ( ) ; List < File > locationsToCheck = new ArrayList < File > ( ) ; if ( Platform . OS_WIN32 . equals ( os ) ) { String [ ] envVariables = new String [ ] { "home" , "userprofile" , "home" , "userprofile" , "ProgramFiles(X86)" , "ProgramFiles" } ; String [ ] appendedPaths = new String [ ] { "\\Local Settings\\Application Data\\Google\\Chrome\\Application\\chrome.exe" , "\\Local Settings\\Application Data\\Google\\Chrome\\Application\\chrome.exe" , "\\AppData\\Local\\Google\\Chrome\\Application\\chrome.exe" , "\\AppData\\Local\\Google\\Chrome\\Application\\chrome.exe" , "\\Google\\Chrome\\Application\\chrome.exe" , "\\Google\\Chrome\\Application\\chrome.exe" } ; assert envVariables . length == appendedPaths . length ; for ( int i = 0 ; i < envVariables . length ; i ++ ) { String envValue = System . getenv ( envVariables [ i ] ) ; if ( envValue != null ) { locationsToCheck . add ( new File ( envValue + appendedPaths [ i ] ) ) ; } } } else if ( Platform . OS_MACOSX . equals ( os ) ) { locationsToCheck . add ( new File ( "/Applications/ChromeWithSpeedTracer.app" ) ) ; String homeDir = System . getenv ( "HOME" ) ; if ( homeDir != null ) { locationsToCheck . add ( new File ( homeDir + "/Applications/ChromeWithSpeedTracer.app" ) ) ; } } else { locationsToCheck . add ( new File ( "/usr/bin/chrome" ) ) ; locationsToCheck . add ( new File ( "/usr/local/bin/chrome" ) ) ; locationsToCheck . add ( new File ( "/usr/bin/google-chrome" ) ) ; locationsToCheck . add ( new File ( "/usr/local/bin/google-chrome" ) ) ; locationsToCheck . add ( new File ( "/usr/bin/chromium" ) ) ; locationsToCheck . add ( new File ( "/usr/local/bin/chromium" ) ) ; locationsToCheck . add ( new File ( "/usr/bin/chromium-browser" ) ) ; locationsToCheck . add ( new File ( "/usr/local/bin/chromium-browser" ) ) ; } for ( File location : locationsToCheck ) { if ( location . exists ( ) && ( Platform . OS_MACOSX . equals ( os ) || location . isFile ( ) ) ) { return location . getAbsolutePath ( ) ; } } return null ; }
target:  Locates a Chrome installation in one of the default installation directories.