Bug 1609078 - Removed browser.tabs.remote.useCORP r=valentin

Differential Revision: https://phabricator.services.mozilla.com/D66861

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

modules/libpref/init/StaticPrefList.yaml

@@ -1012,15 +1012,6 @@
 #endif
   mirror: always
 
-# When this pref is enabled, the browser will check no-cors responses that
-# have the Cross-Origin-Resource-Policy header and will fail the request if
-# the origin of the resource's loading document doesn't match the origin
-# (or base domain) of the loaded resource.
-- name: browser.tabs.remote.useCORP
-  type: bool
-  value: true
-  mirror: always
-
 # The percentage of the screen that needs to be scrolled before toolbar
 # manipulation is allowed.
 - name: browser.ui.scroll-toolbar-threshold

netwerk/protocol/http/nsHttpChannel.cpp

@@ -7666,10 +7666,6 @@ nsresult nsHttpChannel::ProcessCrossOriginEmbedderPolicyHeader() {
 
 // https://mikewest.github.io/corpp/#corp-check
 nsresult nsHttpChannel::ProcessCrossOriginResourcePolicyHeader() {
-  if (!StaticPrefs::browser_tabs_remote_useCORP()) {
-    return NS_OK;
-  }
-
   // Fetch 4.5.9
   uint32_t corsMode;
   MOZ_ALWAYS_SUCCEEDS(GetCorsMode(&corsMode));

testing/web-platform/meta/fetch/cross-origin-resource-policy/__dir__.ini

@@ -1 +0,0 @@
-prefs: [browser.tabs.remote.useCORP:true]

testing/web-platform/meta/html/cross-origin-embedder-policy/__dir__.ini

@@ -1,2 +1,2 @@
-prefs: [browser.tabs.remote.useCrossOriginEmbedderPolicy:true, browser.tabs.remote.useCORP:true]
+prefs: [browser.tabs.remote.useCrossOriginEmbedderPolicy:true]
 lsan-allowed: [Alloc, Malloc, Then, mozilla::BasePrincipal::CreateContentPrincipal, mozilla::SchedulerGroup::CreateEventTargetFor, mozilla::dom::ServiceWorkerJobQueue::RunJob, mozilla::dom::ServiceWorkerManager::Unregister, mozilla::dom::ServiceWorkerRegistrationMainThread::Unregister, mozilla::dom::UnregisterCallback::UnregisterCallback, mozilla::net::nsStandardURL::TemplatedMutator, operator]