lighthouse support

Author: mstoller

README.md

@@ -145,6 +145,7 @@ _The default WPT server can also be specified via environment variable `WEBPAGET
 * **--poll** _\<interval\>_: poll for results after test is scheduled at every <interval> seconds [5]
 * **--wait** _\<hostname:port\>_: wait for test results informed by agent once complete listening on <hostname>:<port> [hostname:first port available above 8000]
 * **--timeout** _\<seconds\>_: timeout for polling and waiting results [no timeout]
+* **--lighthouse**: run lighthouse test (Chrome only, Linux agent only)
 
 #### API Key (works for **test** and **cancel** commands)
 * **-k, --key** _\<api_key\>_:API key (if assigned). Contact the WebPageTest server administrator for a key if required or request an API key for limited testing at [webpagetest.org/getkey.php](https://www.webpagetest.org/getkey.php)

lib/mapping.js

@@ -224,6 +224,12 @@ var options = {
       param: 'switches',
       info: 'use a list of custom command line switches (Chrome only)'
     },
+    'lighthouse': {
+      name: 'lighthouse',
+      api: 'lighthouse',
+      bool: true,
+      info: 'perform lighthouse test (Chrome-only, Linux agents only)'
+    },
 
     // Auth tab
     'login': {

test/fixtures/command-line/help-test.txt

@@ -75,3 +75,4 @@
         --medianrun <metric>      set the run used for median for multiple runs tests [median]
         --specs <json_or_file>    set the specs for performance test suite
         --reporter <name>         set performance test suite reporter output: [dot]|spec|tap|xunit|list|progress|min|nyan|landing|json|doc|markdown|teamcity
+        --lighthouse              run lighthouse test (Chrome only, Linux agent only)