Metrics for document.write script blocking

tools/metrics/histograms/histograms.xml

Index: tools/metrics/histograms/histograms.xml
diff --git a/tools/metrics/histograms/histograms.xml b/tools/metrics/histograms/histograms.xml
index 34e02a3ff0a02d44f7eb9fdce70700eb3fbfc5fb..f3d07effff244ea0b1deade0b2dab55308e4e4be 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -34599,6 +34599,14 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   </summary>
 </histogram>
 
+<histogram name="PageLoad.Clients.DocWrite.Block.Reloads">

[Bryan McQuade, 2016/04/26 19:35:44]

maybe ReloadCount rather than Reloads to be explicit that it's a counter?

[shivanisha, 2016/04/27 13:34:34]

done.

+  <owner>shivanisha@chromium.org</owner>
+  <owner>bmcquade@chromium.org</owner>
+  <summary>
+    Reloads in pages that have blockable document.written scripts.

[jkarlin, 2016/04/26 20:16:21]

When is a script blockable?

[shivanisha, 2016/04/27 13:34:34]

Updated to mention cross-origin and synchronous.

+  </summary>
+</histogram>
+
 <histogram name="PageLoad.Clients.GoogleCaptcha.Events"
     enum="GoogleCaptchaEvent">
   <owner>mdw@chromium.org</owner>
@@ -91712,6 +91720,16 @@ To add a new entry, add it with any value and run test to compute valid value.
 
 <histogram_suffixes name="PageLoadBackgrounded2" separator=".">
   <affected-histogram
+      name="PageLoad.Clients.DocWrite.Block.Timing2.ParseBlockedOnScriptLoad"/>
+  <affected-histogram
+      name="PageLoad.Clients.DocWrite.Block.Timing2.ParseBlockedOnScriptLoad.ParseComplete"/>
+  <affected-histogram
+      name="PageLoad.Clients.DocWrite.Block.Timing2.ParseBlockedOnScriptLoadFromDocumentWrite"/>
+  <affected-histogram
+      name="PageLoad.Clients.DocWrite.Block.Timing2.ParseBlockedOnScriptLoadFromDocumentWrite.ParseComplete"/>
+  <affected-histogram
+      name="PageLoad.Clients.DocWrite.Block.Timing2.ParseDuration"/>
+  <affected-histogram
       name="PageLoad.Clients.DocWrite.Evaluator.Timing2.NavigationToFirstContentfulPaint"/>
   <affected-histogram
       name="PageLoad.Clients.DocWrite.Evaluator.Timing2.ParseBlockedOnScriptLoad"/>
@@ -91772,6 +91790,10 @@ To add a new entry, add it with any value and run test to compute valid value.
   <suffix name="Clients.DocWrite.Evaluator"
       label="PageLoadMetrics from a page that could have been evaluated by
              the DocumentWriteEvaluator"/>
+  <suffix name="Clients.DocWrite.Block"
+      label="PageLoadMetrics from a page that have synchronous
+             document.written cross-origin scripts that could be blocked if
+             the feature is enabled."/>

[jkarlin, 2016/04/26 20:16:21]

If what feature is enabled?

[shivanisha, 2016/04/27 13:34:34]

Updated to mention "document.write script blocking feature".

   <affected-histogram
       name="PageLoad.Timing2.DOMLoadingToDOMContentLoadedEventFired"/>
   <affected-histogram name="PageLoad.Timing2.DOMLoadingToFirstContentfulPaint"/>