[subresource_filter] Add metrics for all NavigationThrottle delays

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 216989cd57dd75a56580d87185b64a35e84e98fc..1b86aa956fbd4b6103790bb6329c2cb7becdd331 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -71413,6 +71413,26 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   </summary>
 </histogram>
 
+<histogram name="SubresourceFilter.DocumentLoad.ActivationComputingDelay"
+    units="ms">
+  <owner>csharrison@chromium.org</owner>
+  <summary>
+    Records the total time a the activation state navigation throttle within a

[shivanisha, 2017/05/05 18:44:51]

Remove 'a '

[Charlie Harrison, 2017/05/05 18:56:07]

Done.

+    document is delayed while calculating activation. Recorded at resume time.
+  </summary>
+</histogram>
+
+<histogram
+    name="SubresourceFilter.DocumentLoad.ActivationComputingDelay.MainFrame"
+    units="ms">
+  <owner>csharrison@chromium.org</owner>
+  <summary>
+    Records the total time a the activation state navigation throttle within a

[shivanisha, 2017/05/05 18:44:50]

Remove 'a '

[Charlie Harrison, 2017/05/05 18:56:07]

Done.

+    main frame document is delayed while calculating activation. Recorded at
+    resume time.
+  </summary>
+</histogram>
+
 <histogram name="SubresourceFilter.DocumentLoad.ActivationState"
     enum="SubresourceFilterActivationState">
   <owner>engedy@chromium.org</owner>
@@ -71476,6 +71496,27 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   </summary>
 </histogram>
 
+<histogram name="SubresourceFilter.DocumentLoad.SubframeFilteringDelay.Allowed"
+    units="ms">
+  <owner>csharrison@chromium.org</owner>
+  <summary>
+    Records the total time a subframe navigation was delayed while calculating
+    whether it should be disallowed or not. Logged for all navigations that were
+    allowed.
+  </summary>
+</histogram>
+
+<histogram
+    name="SubresourceFilter.DocumentLoad.SubframeFilteringDelay.Disallowed"
+    units="ms">
+  <owner>csharrison@chromium.org</owner>
+  <summary>
+    Records the total time a subframe navigation was delayed while calculating
+    whether it should be disallowed or not. Logged for all navigations that were
+    disallowed.
+  </summary>
+</histogram>
+
 <histogram
     name="SubresourceFilter.DocumentLoad.SubresourceEvaluation.TotalCPUDuration"
     units="microseconds">