Remove net::ExclusionReason::EXCLUDE_SAMESITE_EXTENDED.

Bug: 953995
Change-Id: I6e137d81a43a67ca001ec67c77330656664de561
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1894024Reviewed-by: Lily Chen <chlily@chromium.org>
Reviewed-by: Yang Guo <yangguo@chromium.org>
Reviewed-by: Andrey Kosyakov <caseq@chromium.org>
Commit-Queue: Caleb Raitto <caraitto@chromium.org>
Cr-Commit-Position: refs/heads/master@{#712339}

content/browser/devtools/protocol/network_handler.cc

@@ -580,11 +580,6 @@ GetProtocolBlockedSetCookieReason(
           net::CanonicalCookie::CookieInclusionStatus::EXCLUDE_SAMESITE_LAX)) {
     blockedReasons->push_back(Network::SetCookieBlockedReasonEnum::SameSiteLax);
   }
-  if (status.HasExclusionReason(net::CanonicalCookie::CookieInclusionStatus::
-                                    EXCLUDE_SAMESITE_EXTENDED)) {
-    blockedReasons->push_back(
-        Network::SetCookieBlockedReasonEnum::SameSiteExtended);
-  }
   if (status.HasExclusionReason(
           net::CanonicalCookie::CookieInclusionStatus::
               EXCLUDE_SAMESITE_UNSPECIFIED_TREATED_AS_LAX)) {
@@ -660,11 +655,6 @@ GetProtocolBlockedCookieReason(
           net::CanonicalCookie::CookieInclusionStatus::EXCLUDE_SAMESITE_LAX)) {
     blockedReasons->push_back(Network::CookieBlockedReasonEnum::SameSiteLax);
   }
-  if (status.HasExclusionReason(net::CanonicalCookie::CookieInclusionStatus::
-                                    EXCLUDE_SAMESITE_EXTENDED)) {
-    blockedReasons->push_back(
-        Network::CookieBlockedReasonEnum::SameSiteExtended);
-  }
   if (status.HasExclusionReason(
           net::CanonicalCookie::CookieInclusionStatus::
               EXCLUDE_SAMESITE_UNSPECIFIED_TREATED_AS_LAX)) {

net/cookies/canonical_cookie.cc

@@ -865,8 +865,6 @@ std::string CanonicalCookie::CookieInclusionStatus::GetDebugString() const {
     base::StrAppend(&out, {"EXCLUDE_SAMESITE_STRICT, "});
   if (HasExclusionReason(EXCLUDE_SAMESITE_LAX))
     base::StrAppend(&out, {"EXCLUDE_SAMESITE_LAX, "});
-  if (HasExclusionReason(EXCLUDE_SAMESITE_EXTENDED))
-    base::StrAppend(&out, {"EXCLUDE_SAMESITE_EXTENDED, "});
   if (HasExclusionReason(EXCLUDE_SAMESITE_UNSPECIFIED_TREATED_AS_LAX))
     base::StrAppend(&out, {"EXCLUDE_SAMESITE_UNSPECIFIED_TREATED_AS_LAX, "});
   if (HasExclusionReason(EXCLUDE_SAMESITE_NONE_INSECURE))

net/cookies/canonical_cookie.h

@@ -319,9 +319,8 @@ class NET_EXPORT CanonicalCookie::CookieInclusionStatus {
     EXCLUDE_NOT_ON_PATH = 4,
     EXCLUDE_SAMESITE_STRICT = 5,
     EXCLUDE_SAMESITE_LAX = 6,
-    // TODO(crbug.com/989171): Replace this with FirstPartyLax and
-    // FirstPartyStrict.
-    EXCLUDE_SAMESITE_EXTENDED = 7,
+    // Reserved 7, was EXCLUDE_SAMESITE_EXTENDED.
+
     // The following two are used for the SameSiteByDefaultCookies experiment,
     // where if the SameSite attribute is not specified, it will be treated as
     // SameSite=Lax by default.

third_party/blink/renderer/core/inspector/browser_protocol.pdl

@@ -4151,8 +4151,6 @@ domain Network
       SameSiteStrict
       # The cookie had the "SameSite=Lax" attribute but came from a cross-origin response.
       SameSiteLax
-      # The cookie had the "SameSite=Extended" attribute but came from a cross-origin response.
-      SameSiteExtended
       # The cookie didn't specify a "SameSite" attribute and was defaulted to "SameSite=Lax" and
       # broke the same rules specified in the SameSiteLax value.
       SameSiteUnspecifiedTreatedAsLax
@@ -4193,9 +4191,6 @@ domain Network
       # The cookie had the "SameSite=Lax" attribute and the request was made on a different site.
       # This does not include navigation requests initiated by other sites.
       SameSiteLax
-      # The cookie had the "SameSite=Extended" attribute and the request was made on a different
-      # site. The different site is outside of the cookie's trusted first-party set.
-      SameSiteExtended
       # The cookie didn't specify a SameSite attribute when it was stored and was defaulted to
       # "SameSite=Lax" and broke the same rules specified in the SameSiteLax value. The cookie had
       # to have been set with "SameSite=None" to enable third-party usage.