Bug 1589011 - Use a custom domain name in DAMP tests r=ochameau

Depends on D49569

We can stop using the exact host:port URL and rely on the proxy for all DAMP calls

Differential Revision: https://phabricator.services.mozilla.com/D53317

--HG--
extra : moz-landing-system : lando

testing/talos/talos/test.py

@@ -460,8 +460,7 @@ class damp(PageloaderTest):
     gecko_profile_entries = 10000000
     win_counters = w7_counters = linux_counters = mac_counters = None
     filters = filter.ignore_first.prepare(1) + filter.median.prepare()
-    preferences = {'devtools.memory.enabled': True,
-                   'addon.test.damp.webserver': '${webserver}'}
+    preferences = {'devtools.memory.enabled': True}
     unit = 'ms'
     subtest_alerts = True
     perfherder_framework = 'devtools'

testing/talos/talos/tests/devtools/addon/content/tests/head.js

@@ -12,14 +12,20 @@ const Services = require("Services");
 const { gDevTools } = require("devtools/client/framework/devtools");
 const { TargetFactory } = require("devtools/client/framework/target");
 
-const webserver = Services.prefs.getCharPref("addon.test.damp.webserver");
-
-const PAGES_BASE_URL = webserver + "/tests/devtools/addon/content/pages/";
+// With Bug 1588203, the talos server supports a dynamic proxy that will
+// redirect any http:// call to the talos server. This means we can use
+// arbitrary domains for our tests.
+// Iframes may be loaded via http://damp.frame1.com, http://damp.frame2.com, etc...
+// or any other domain name that is sensible for a given test.
+// To trigger frames to load in separate processes, they must have a different
+// eTLD+1, which means public suffix (.com, .org, ...) and the label before.
+const BASE_DOMAIN = "http://damp.top.com";
+const PAGES_BASE_URL = BASE_DOMAIN + "/tests/devtools/addon/content/pages/";
 
 exports.PAGES_BASE_URL = PAGES_BASE_URL;
 exports.SIMPLE_URL = PAGES_BASE_URL + "simple.html";
 exports.COMPLICATED_URL =
-  webserver + "/tests/tp5n/bild.de/www.bild.de/index.html";
+  BASE_DOMAIN + "/tests/tp5n/bild.de/www.bild.de/index.html";
 
 let damp = null;
 /*

testing/talos/talos/unittests/test_config.py

@@ -479,8 +479,7 @@ class Test_get_config(object):
         assert 'mac_counters' not in test_config
         assert test_config['filters'] is not None
         assert test_config['preferences'] == {
-            'devtools.memory.enabled': True,
-            'addon.test.damp.webserver': '${webserver}'
+            'devtools.memory.enabled': True
         }
         assert test_config['unit'] == 'ms'