Add use counters for new samesite rules

Bug: 966576
Change-Id: Ic8fcaeba818ed012175ea12cb3d52a018fc40785
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1636341
Commit-Queue: Aaron Tagliaboschi <aarontag@chromium.org>
Reviewed-by: Bryan McQuade <bmcquade@chromium.org>
Cr-Commit-Position: refs/heads/master@{#664771}

chrome/browser/page_load_metrics/observers/use_counter/ukm_features.cc

@@ -98,6 +98,8 @@ UseCounterPageLoadMetricsObserver::GetAllowedUkmFeatures() {
           WebFeature::kMediaCapabilitiesDecodingInfoWithKeySystemConfig,
           WebFeature::kTextFragmentAnchor,
           WebFeature::kTextFragmentAnchorMatchFound,
+          WebFeature::kCookieNoSameSite,
+          WebFeature::kCookieInsecureAndSameSiteNone,
       }));
   return *opt_in_features;
 }

third_party/blink/public/mojom/web_feature/web_feature.mojom

@@ -2305,6 +2305,8 @@ enum WebFeature {
   kFetchKeepalive = 2913,
   kCSSTransitionCancelledByRemovingStyle = 2914,
   kV8RTCRtpSender_SetStreams_Method = 2915,
+  kCookieNoSameSite = 2916,
+  kCookieInsecureAndSameSiteNone = 2917,
 
   // Add new features immediately above this line. Don't change assigned
   // numbers of any item, and don't reuse removed slots.

tools/metrics/histograms/enums.xml

@@ -23446,6 +23446,8 @@ Called by update_net_error_codes.py.-->
   <int value="2913" label="FetchKeepalive"/>
   <int value="2914" label="CSSTransitionCancelledByRemovingStyle"/>
   <int value="2915" label="V8RTCRtpSender_SetStreams_Method"/>
+  <int value="2916" label="CookieNoSameSite"/>
+  <int value="2917" label="CookieInsecureAndSameSiteNone"/>
 </enum>
 
 <enum name="FeaturePolicyFeature">