[HBD] Add Plugins permission type and PermissionContext

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 9da686b5ac9fd5c0d916b7f551f4669c95d295c9..712fd438b17408fbe4e7dbceb36820e13cdcb6b3 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -91090,6 +91090,7 @@ To add a new entry, add it with any value and run test to compute valid value.
   <int value="8" label="PERMISSION_AUDIO_CAPTURE"/>
   <int value="9" label="PERMISSION_VIDEO_CAPTURE"/>
   <int value="10" label="PERMISSION_BACKGROUND_SYNC"/>
+  <int value="11" label="PERMISSION_PLUGINS"/>
 </enum>
 
 <enum name="PersistentHistogramsInitResult" type="int">
@@ -104461,6 +104462,7 @@ To add a new entry, add it with any value and run test to compute valid value.
   <suffix name="DurableStorage" label="Durable Storage permission actions"/>
   <suffix name="AudioCapture" label="Microphone permission actions"/>
   <suffix name="VideoCapture" label="Camera permission actions"/>
+  <suffix name="Plugins" label="Plugins permission actions"/>
   <affected-histogram name="ContentSettings.PermissionActions"/>
   <affected-histogram name="ContentSettings.PermissionActionsInsecureOrigin"/>
   <affected-histogram name="ContentSettings.PermissionActionsSecureOrigin"/>