MediaPerceptionPrivate IDL and skeleton.

tools/metrics/histograms/enums.xml

Index: tools/metrics/histograms/enums.xml
diff --git a/tools/metrics/histograms/enums.xml b/tools/metrics/histograms/enums.xml
index 8f1ab9bf3a724dcd0d8baae9f0f7f3bc7145e834..6fea1d22665c83fb479e3f5339f4741b4e0efd6d 100644
--- a/tools/metrics/histograms/enums.xml
+++ b/tools/metrics/histograms/enums.xml
@@ -11048,6 +11048,7 @@ uploading your change for review.  These are checked by presubmit scripts.
   <int value="405" label="FILE_MANAGER_PRIVATE_ON_APPS_UPDATED"/>
   <int value="406" label="ACCESSIBILITY_PRIVATE_ON_TWO_FINGER_TOUCH_START"/>
   <int value="407" label="ACCESSIBILITY_PRIVATE_ON_TWO_FINGER_TOUCH_STOP"/>
+  <int value="408" label="MEDIA_PERCEPTION_PRIVATE_ON_MEDIA_PERCEPTION"/>
 </enum>
 
 <enum name="ExtensionFileWriteResult" type="int">
@@ -12271,6 +12272,9 @@ uploading your change for review.  These are checked by presubmit scripts.
   <int value="1171" label="AUTOTESTPRIVATE_GETPLAYSTORESTATE"/>
   <int value="1172" label="AUTOTESTPRIVATE_SETPLAYSTOREENABLED"/>
   <int value="1173" label="APP_CURRENTWINDOWINTERNAL_SETACTIVATEONPOINTER"/>
+  <int value="1174" label="MEDIAPERCEPTIONPRIVATE_GETSTATE"/>
+  <int value="1175" label="MEDIAPERCEPTIONPRIVATE_SETSTATE"/>
+  <int value="1176" label="MEDIAPERCEPTIONPRIVATE_GETDIAGNOSTICS"/>
 </enum>
 
 <enum name="ExtensionIconState" type="int">