[Inspector][Metrics] Add animation metric related enums

See the frontend CL: crrev.com/c/4757139

Fixed: 1470737
Change-Id: I7b9103c2c7f7ce3be3751d7080697606f4bb2530
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4758505
Reviewed-by: Changhao Han <changhaohan@chromium.org>
Commit-Queue: Changhao Han <changhaohan@chromium.org>
Auto-Submit: Ergün Erdoğmuş <ergunsh@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1180843}

tools/metrics/histograms/enums.xml

@@ -27308,6 +27308,28 @@ located in chromeos/ash/components/device_activity/device_activity_client.h -->
   <int value="96" label="Override Content Context Menu Save New File"/>
   <int value="97" label="Show All Overrides From Sources Context Menu"/>
   <int value="98" label="Show All Overrides From Network Context Menu"/>
+  <int value="99" label="Animations panel - Animation groups are cleared"/>
+  <int value="100" label="Animations panel - Animations are paused"/>
+  <int value="101" label="Animations panel - Animations are resumed"/>
+  <int value="102"
+      label="Animations panel - Animated node description is clicked"/>
+  <int value="103" label="Animations panel - Animation group is scrubbed"/>
+  <int value="104" label="Animations panel - Animation group is replayed"/>
+</enum>
+
+<enum name="DevToolsAnimationPlaybackRateChanged">
+  <int value="0" label="100%"/>
+  <int value="1" label="25%"/>
+  <int value="2" label="10%"/>
+  <int value="3" label="Other"/>
+</enum>
+
+<enum name="DevToolsAnimationPointDragged">
+  <int value="0" label="Animation is dragged as a whole"/>
+  <int value="1" label="Keyframe is moved"/>
+  <int value="2" label="Animation start point is moved"/>
+  <int value="3" label="Animation finish point is moved"/>
+  <int value="4" label="Other"/>
 </enum>
 
 <enum name="DevToolsBackgroundService">

tools/metrics/histograms/metadata/dev/histograms.xml

@@ -30,6 +30,25 @@ chromium-metrics-reviews@google.com.
   <summary>Specified DevTools action has been taken.</summary>
 </histogram>
 
+<histogram name="DevTools.AnimationPlaybackRateChanged"
+    enum="DevToolsAnimationPlaybackRateChanged" expires_after="2024-08-08">
+  <owner>yangguo@chromium.org</owner>
+  <owner>changhaohan@chromium.org</owner>
+  <owner>ergunsh@chromium.org</owner>
+  <summary>Playback rate is changed in Animations panel in DevTools.</summary>
+</histogram>
+
+<histogram name="DevTools.AnimationPointDragged"
+    enum="DevToolsAnimationPointDragged" expires_after="2024-08-08">
+  <owner>yangguo@chromium.org</owner>
+  <owner>changhaohan@chromium.org</owner>
+  <owner>ergunsh@chromium.org</owner>
+  <summary>
+    An animation's duration or delay updated visually by dragging the animation
+    point in Animations panel in DevTools.
+  </summary>
+</histogram>
+
 <histogram name="DevTools.BadgeActivated" enum="DevToolsBadgeActivated"
     expires_after="2023-12-31">
   <owner>ergunsh@chromium.org</owner>