Add UMA for autoblocking and embargoing.

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 32d7f49e15fde49dffc09dca41d4e4bc6231d5f1..47b052145d3c44d3c2900368665b1ac61e44e3a2 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -45593,6 +45593,52 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   </summary>
 </histogram>
 
+<histogram name="Permissions.AutoBlocker.EmbargoReason"
+    enum="PermissionEmbargoReason">
+  <owner>dominickn@chromium.org</owner>
+  <owner>kcarattini@chromium.org</owner>
+  <summary>
+    Tracks the reason that an (origin, permission) pair has been placed under
+    embargo (blocked from making requests for that permission for a period of
+    time).
+  </summary>
+</histogram>
+
+<histogram name="Permissions.AutoBlocker.RepeatedEmbargo"
+    enum="PermissionEmbargoReason">
+  <owner>dominickn@chromium.org</owner>
+  <owner>kcarattini@chromium.org</owner>
+  <summary>
+    Records occurences of permission requests being placed under embargo after
+    the embargo period has ended. This can occur on the next permission request
+    after the embargo period has ended, if the origin is still blacklisted, or
+    another dismissal is recorded. This only tracks when the embargo is
+    reinstated for the same type of permission.
+  </summary>
+</histogram>
+
+<histogram name="Permissions.AutoBlocker.SafeBrowsingResponse"
+    enum="SafeBrowsingResponse">
+  <owner>dominickn@chromium.org</owner>
+  <owner>kcarattini@chromium.org</owner>
+  <summary>
+    Tracks the response (if received) from Safe Browsing when the API blacklist
+    is queried for an (origin, permission) pair. The response could be that the
+    origin was blacklisted, not blacklisted, or Safe Browsing timed out before a
+    response was received.
+  </summary>
+</histogram>
+
+<histogram name="Permissions.AutoBlocker.SafeBrowsingResponseTime" units="ms">
+  <owner>dominickn@chromium.org</owner>
+  <owner>kcarattini@chromium.org</owner>
+  <summary>
+    Records the elapsed time between the client sending a request to Safe
+    Browsing and receiving a result, or the maximum wait time is exceeded and
+    Safe Browsing is deemed to have timed out.
+  </summary>
+</histogram>
+
 <histogram name="Permissions.Prompt.Accepted" enum="PermissionRequestType">
   <owner>dominickn@chromium.org</owner>
   <owner>kcarattini@chromium.org</owner>
@@ -101227,6 +101273,12 @@ value.
   <int value="4" label="REVOKED"/>
 </enum>
 
+<enum name="PermissionEmbargoReason" type="int">
+  <int value="0" label="REPEATED_DISMISSALS"/>
+  <int value="1" label="PERMISSIONS_BLACKLISTING"/>
+  <int value="2" label="NOT_EMBARGOED"/>
+</enum>
+
 <enum name="PermissionRequestType" type="int">
   <int value="0" label="PERMISSION_BUBBLE_UNKNOWN"/>
   <int value="1" label="PERMISSION_BUBBLE_MULTIPLE"/>
@@ -103845,6 +103897,12 @@ value.
   <int value="4" label="NO_STATE_ERROR"/>
 </enum>
 
+<enum name="SafeBrowsingResponse" type="int">
+  <int value="0" label="NOT_BLACKLISTED"/>
+  <int value="1" label="TIMEOUT"/>
+  <int value="2" label="BLACKLISTED"/>
+</enum>
+
 <enum name="SafeBrowsingV4ApplyUpdateResult" type="int">
   <int value="0" label="APPLY_UPDATE_SUCCESS"/>
   <int value="1" label="UNEXPECTED_APPLY_UPDATE_FAILURE"/>