Auto merge of #11978 - aravind-pg:new-referrer-pols, r=jdm

Add "origin" and "same-origin" referrer policies, replacing "origin-only".

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- [X] `./mach build -d` does not report any errors
- [X] `./mach test-tidy` does not report any errors
- [X] These changes fix #11384
- [X] There are tests for these changes

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components/msg/constellation_msg.rs

@@ -333,7 +333,8 @@ pub enum FrameType {
 pub enum ReferrerPolicy {
     NoReferrer,
     NoRefWhenDowngrade,
-    OriginOnly,
+    Origin,
+    SameOrigin,
     OriginWhenCrossOrigin,
     UnsafeUrl,
 }

components/net/http_loader.rs

@@ -458,7 +458,8 @@ pub fn determine_request_referrer(headers: &mut Headers,
         let cross_origin = ref_url.origin() != url.origin();
         return match referrer_policy {
             Some(ReferrerPolicy::NoReferrer) => None,
-            Some(ReferrerPolicy::OriginOnly) => strip_url(ref_url, true),
+            Some(ReferrerPolicy::Origin) => strip_url(ref_url, true),
+            Some(ReferrerPolicy::SameOrigin) => if cross_origin { None } else { strip_url(ref_url, false) },
             Some(ReferrerPolicy::UnsafeUrl) => strip_url(ref_url, false),
             Some(ReferrerPolicy::OriginWhenCrossOrigin) => strip_url(ref_url, cross_origin),
             Some(ReferrerPolicy::NoRefWhenDowngrade) | None => no_ref_when_downgrade_header(ref_url, url),

components/script/dom/document.rs

@@ -2832,7 +2832,8 @@ pub fn determine_policy_for_token(token: &str) -> Option<ReferrerPolicy> {
     return match lower.as_ref() {
         "never" | "no-referrer" => Some(ReferrerPolicy::NoReferrer),
         "default" | "no-referrer-when-downgrade" => Some(ReferrerPolicy::NoRefWhenDowngrade),
-        "origin" => Some(ReferrerPolicy::OriginOnly),
+        "origin" => Some(ReferrerPolicy::Origin),
+        "same-origin" => Some(ReferrerPolicy::SameOrigin),
         "origin-when-cross-origin" => Some(ReferrerPolicy::OriginWhenCrossOrigin),
         "always" | "unsafe-url" => Some(ReferrerPolicy::UnsafeUrl),
         "" => Some(ReferrerPolicy::NoReferrer),