Bug 1440678 - Disable RDM reload notification for tests. r=ochameau

MozReview-Commit-ID: 5dXxE6u1ZSI

--HG--
extra : rebase_source : 8ef589abc535b06216c2e6545e461c64dc0b206a

devtools/client/responsive.html/test/browser/head.js

@@ -50,10 +50,14 @@ requestLongerTimeout(2);
 
 flags.testing = true;
 Services.prefs.setCharPref("devtools.devices.url", TEST_URI_ROOT + "devices.json");
+// The appearance of this notification causes intermittent behavior in some tests that
+// send mouse events, since it causes the content to shift when it appears.
+Services.prefs.setBoolPref("devtools.responsive.reloadNotification.enabled", false);
 
 registerCleanupFunction(async () => {
   flags.testing = false;
   Services.prefs.clearUserPref("devtools.devices.url");
+  Services.prefs.clearUserPref("devtools.responsive.reloadNotification.enabled");
   Services.prefs.clearUserPref("devtools.responsive.html.displayedDeviceList");
   Services.prefs.clearUserPref("devtools.responsive.reloadConditions.touchSimulation");
   Services.prefs.clearUserPref("devtools.responsive.reloadConditions.userAgent");